Finding the Fourth Proportional to 689,572.20, 1,034,358.30 and 639,805.80
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Solution
The fourth proportional to 689,572.20, 1,034,358.30 and 639,805.80 is: 959,708.70
Step by Step Solution
- Step 1: Write the proportion equation
689,572.20 : 1,034,358.30 = 639,805.80 : x - Step 2: Convert to fraction form
689,572.20/1,034,358.30 = 639,805.80/x - Step 3: Cross multiply
689,572.20x = 1,034,358.30 × 639,805.80 - Step 4: Simplify right side
689,572.20x = 661,788,439,618.14 - Step 5: Solve for x
x = 661,788,439,618.14/689,572.20 - Step 6: Final answer
x = 959,708.70
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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.