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Finding the Fourth Proportional to 485,724.60, 728,270.10 and 435,958.20

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Solution

The fourth proportional to 485,724.60, 728,270.10 and 435,958.20 is: 653,652.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,724.60 : 728,270.10 = 435,958.20 : x
  2. Step 2: Convert to fraction form
    485,724.60/728,270.10 = 435,958.20/x
  3. Step 3: Cross multiply
    485,724.60x = 728,270.10 × 435,958.20
  4. Step 4: Simplify right side
    485,724.60x = 317,495,321,909.82
  5. Step 5: Solve for x
    x = 317,495,321,909.82/485,724.60
  6. Step 6: Final answer
    x = 653,652.96

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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.