Home / 649,461.20-974,191.80-425,512.40

Finding the Fourth Proportional to 649,461.20, 974,191.80 and 425,512.40

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Solution

The fourth proportional to 649,461.20, 974,191.80 and 425,512.40 is: 638,268.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,461.20 : 974,191.80 = 425,512.40 : x
  2. Step 2: Convert to fraction form
    649,461.20/974,191.80 = 425,512.40/x
  3. Step 3: Cross multiply
    649,461.20x = 974,191.80 × 425,512.40
  4. Step 4: Simplify right side
    649,461.20x = 414,530,690,878.32
  5. Step 5: Solve for x
    x = 414,530,690,878.32/649,461.20
  6. Step 6: Final answer
    x = 638,268.60

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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.