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Finding the Fourth Proportional to 657,715.20, 986,572.80 and 447,763.20

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Solution

The fourth proportional to 657,715.20, 986,572.80 and 447,763.20 is: 671,644.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,715.20 : 986,572.80 = 447,763.20 : x
  2. Step 2: Convert to fraction form
    657,715.20/986,572.80 = 447,763.20/x
  3. Step 3: Cross multiply
    657,715.20x = 986,572.80 × 447,763.20
  4. Step 4: Simplify right side
    657,715.20x = 441,750,993,960.96
  5. Step 5: Solve for x
    x = 441,750,993,960.96/657,715.20
  6. Step 6: Final answer
    x = 671,644.80

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Double scale
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Similar ratio
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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.