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Finding the Fourth Proportional to 485,489.60, 728,234.40 and 415,505.60

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Solution

The fourth proportional to 485,489.60, 728,234.40 and 415,505.60 is: 623,258.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,489.60 : 728,234.40 = 415,505.60 : x
  2. Step 2: Convert to fraction form
    485,489.60/728,234.40 = 415,505.60/x
  3. Step 3: Cross multiply
    485,489.60x = 728,234.40 × 415,505.60
  4. Step 4: Simplify right side
    485,489.60x = 302,585,471,312.64
  5. Step 5: Solve for x
    x = 302,585,471,312.64/485,489.60
  6. Step 6: Final answer
    x = 623,258.40

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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.