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Finding the Fourth Proportional to 664,305.20, 996,457.80 and 487,158.20

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Solution

The fourth proportional to 664,305.20, 996,457.80 and 487,158.20 is: 730,737.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,305.20 : 996,457.80 = 487,158.20 : x
  2. Step 2: Convert to fraction form
    664,305.20/996,457.80 = 487,158.20/x
  3. Step 3: Cross multiply
    664,305.20x = 996,457.80 × 487,158.20
  4. Step 4: Simplify right side
    664,305.20x = 485,432,588,223.96
  5. Step 5: Solve for x
    x = 485,432,588,223.96/664,305.20
  6. Step 6: Final answer
    x = 730,737.30

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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.