Finding the Fourth Proportional to 398,129.12, 549,418.20 and 219,281.12
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Solution
The fourth proportional to 398,129.12, 549,418.20 and 219,281.12 is: 302,607.95
Step by Step Solution
- Step 1: Write the proportion equation
398,129.12 : 549,418.20 = 219,281.12 : x - Step 2: Convert to fraction form
398,129.12/549,418.20 = 219,281.12/x - Step 3: Cross multiply
398,129.12x = 549,418.20 × 219,281.12 - Step 4: Simplify right side
398,129.12x = 120,477,038,244.38 - Step 5: Solve for x
x = 120,477,038,244.38/398,129.12 - Step 6: Final answer
x = 302,607.95
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.