Home / 649,435.20-974,152.80-425,486.40

Finding the Fourth Proportional to 649,435.20, 974,152.80 and 425,486.40

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Solution

The fourth proportional to 649,435.20, 974,152.80 and 425,486.40 is: 638,229.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,435.20 : 974,152.80 = 425,486.40 : x
  2. Step 2: Convert to fraction form
    649,435.20/974,152.80 = 425,486.40/x
  3. Step 3: Cross multiply
    649,435.20x = 974,152.80 × 425,486.40
  4. Step 4: Simplify right side
    649,435.20x = 414,488,767,921.92
  5. Step 5: Solve for x
    x = 414,488,767,921.92/649,435.20
  6. Step 6: Final answer
    x = 638,229.60

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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.