Finding the Fourth Proportional to 687,616.20, 1,031,861.70 and 403,306.20
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Solution
The fourth proportional to 687,616.20, 1,031,861.70 and 403,306.20 is: 605,215.85
Step by Step Solution
- Step 1: Write the proportion equation
687,616.20 : 1,031,861.70 = 403,306.20 : x - Step 2: Convert to fraction form
687,616.20/1,031,861.70 = 403,306.20/x - Step 3: Cross multiply
687,616.20x = 1,031,861.70 × 403,306.20 - Step 4: Simplify right side
687,616.20x = 416,156,221,152.54 - Step 5: Solve for x
x = 416,156,221,152.54/687,616.20 - Step 6: Final answer
x = 605,215.85
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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.