Finding the Fourth Proportional to 390,873.80, 528,094.35 and 390,873.80
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Solution
The fourth proportional to 390,873.80, 528,094.35 and 390,873.80 is: 528,094.35
Step by Step Solution
- Step 1: Write the proportion equation
390,873.80 : 528,094.35 = 390,873.80 : x - Step 2: Convert to fraction form
390,873.80/528,094.35 = 390,873.80/x - Step 3: Cross multiply
390,873.80x = 528,094.35 × 390,873.80 - Step 4: Simplify right side
390,873.80x = 206,418,245,343.03 - Step 5: Solve for x
x = 206,418,245,343.03/390,873.80 - Step 6: Final answer
x = 528,094.35
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Why These Related Problems?
These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.