Home / 649,670.10-974,505.15-425,721.30

Finding the Fourth Proportional to 649,670.10, 974,505.15 and 425,721.30

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Solution

The fourth proportional to 649,670.10, 974,505.15 and 425,721.30 is: 638,581.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,670.10 : 974,505.15 = 425,721.30 : x
  2. Step 2: Convert to fraction form
    649,670.10/974,505.15 = 425,721.30/x
  3. Step 3: Cross multiply
    649,670.10x = 974,505.15 × 425,721.30
  4. Step 4: Simplify right side
    649,670.10x = 414,867,599,314.70
  5. Step 5: Solve for x
    x = 414,867,599,314.70/649,670.10
  6. Step 6: Final answer
    x = 638,581.95

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Half scale
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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.