Finding the Fourth Proportional to 390,119,058.60, 585,177,421.50 and 98,985,618.60
Calculator
Solution
The fourth proportional to 390,119,058.60, 585,177,421.50 and 98,985,618.60 is: 148,478,131.95
Step by Step Solution
- Step 1: Write the proportion equation
390,119,058.60 : 585,177,421.50 = 98,985,618.60 : x - Step 2: Convert to fraction form
390,119,058.60/585,177,421.50 = 98,985,618.60/x - Step 3: Cross multiply
390,119,058.60x = 585,177,421.50 × 98,985,618.60 - Step 4: Simplify right side
390,119,058.60x = 57,924,149,057,930,440 - Step 5: Solve for x
x = 57,924,149,057,930,440/390,119,058.60 - Step 6: Final answer
x = 148,478,131.95
Related Problems
Find fourth proportional to 195,059,529.30, 292,588,710.75 and 49,492,809.30
Half scale
Find fourth proportional to 780,238,117.20, 1,170,354,843 and 197,971,237.20
Double scale
Find fourth proportional to 390,119,059.60, 585,177,423 and 98,985,619.60
Similar ratio
Find fourth proportional to 585,178,587.90, 877,766,132.25 and 148,478,427.90
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.