Home / 657,030.10-985,545.15-420,834.10

Finding the Fourth Proportional to 657,030.10, 985,545.15 and 420,834.10

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Solution

The fourth proportional to 657,030.10, 985,545.15 and 420,834.10 is: 631,251.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,030.10 : 985,545.15 = 420,834.10 : x
  2. Step 2: Convert to fraction form
    657,030.10/985,545.15 = 420,834.10/x
  3. Step 3: Cross multiply
    657,030.10x = 985,545.15 × 420,834.10
  4. Step 4: Simplify right side
    657,030.10x = 414,751,006,209.62
  5. Step 5: Solve for x
    x = 414,751,006,209.62/657,030.10
  6. Step 6: Final answer
    x = 631,251.15

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Double scale
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Similar ratio
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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.