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Finding the Fourth Proportional to 485,655.90, 728,483.85 and 272,204.70

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Solution

The fourth proportional to 485,655.90, 728,483.85 and 272,204.70 is: 408,307.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,655.90 : 728,483.85 = 272,204.70 : x
  2. Step 2: Convert to fraction form
    485,655.90/728,483.85 = 272,204.70/x
  3. Step 3: Cross multiply
    485,655.90x = 728,483.85 × 272,204.70
  4. Step 4: Simplify right side
    485,655.90x = 198,296,727,844.10
  5. Step 5: Solve for x
    x = 198,296,727,844.10/485,655.90
  6. Step 6: Final answer
    x = 408,307.05

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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.