Finding the Fourth Proportional to 390,805.92, 539,313.12 and 211,957.92
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Solution
The fourth proportional to 390,805.92, 539,313.12 and 211,957.92 is: 292,502.45
Step by Step Solution
- Step 1: Write the proportion equation
390,805.92 : 539,313.12 = 211,957.92 : x - Step 2: Convert to fraction form
390,805.92/539,313.12 = 211,957.92/x - Step 3: Cross multiply
390,805.92x = 539,313.12 × 211,957.92 - Step 4: Simplify right side
390,805.92x = 114,311,687,143.91 - Step 5: Solve for x
x = 114,311,687,143.91/390,805.92 - Step 6: Final answer
x = 292,502.45
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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.