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Finding the Fourth Proportional to 649,637.70, 974,456.55 and 425,688.90

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Solution

The fourth proportional to 649,637.70, 974,456.55 and 425,688.90 is: 638,533.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,637.70 : 974,456.55 = 425,688.90 : x
  2. Step 2: Convert to fraction form
    649,637.70/974,456.55 = 425,688.90/x
  3. Step 3: Cross multiply
    649,637.70x = 974,456.55 × 425,688.90
  4. Step 4: Simplify right side
    649,637.70x = 414,815,336,867.30
  5. Step 5: Solve for x
    x = 414,815,336,867.30/649,637.70
  6. Step 6: Final answer
    x = 638,533.35

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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.