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Finding the Fourth Proportional to 485,842.60, 728,447.10 and 436,076.20

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Solution

The fourth proportional to 485,842.60, 728,447.10 and 436,076.20 is: 653,829.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,842.60 : 728,447.10 = 436,076.20 : x
  2. Step 2: Convert to fraction form
    485,842.60/728,447.10 = 436,076.20/x
  3. Step 3: Cross multiply
    485,842.60x = 728,447.10 × 436,076.20
  4. Step 4: Simplify right side
    485,842.60x = 317,658,443,269.02
  5. Step 5: Solve for x
    x = 317,658,443,269.02/485,842.60
  6. Step 6: Final answer
    x = 653,829.95

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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.