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Finding the Fourth Proportional to 485,355.50, 728,070.06 and 165,407.90

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Solution

The fourth proportional to 485,355.50, 728,070.06 and 165,407.90 is: 248,124.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,355.50 : 728,070.06 = 165,407.90 : x
  2. Step 2: Convert to fraction form
    485,355.50/728,070.06 = 165,407.90/x
  3. Step 3: Cross multiply
    485,355.50x = 728,070.06 × 165,407.90
  4. Step 4: Simplify right side
    485,355.50x = 120,428,539,677.47
  5. Step 5: Solve for x
    x = 120,428,539,677.47/485,355.50
  6. Step 6: Final answer
    x = 248,124.39

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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.