Home / 649,414.20-974,121.30-425,465.40

Finding the Fourth Proportional to 649,414.20, 974,121.30 and 425,465.40

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Solution

The fourth proportional to 649,414.20, 974,121.30 and 425,465.40 is: 638,198.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,414.20 : 974,121.30 = 425,465.40 : x
  2. Step 2: Convert to fraction form
    649,414.20/974,121.30 = 425,465.40/x
  3. Step 3: Cross multiply
    649,414.20x = 974,121.30 × 425,465.40
  4. Step 4: Simplify right side
    649,414.20x = 414,454,908,553.02
  5. Step 5: Solve for x
    x = 414,454,908,553.02/649,414.20
  6. Step 6: Final answer
    x = 638,198.10

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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.