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Finding the Fourth Proportional to 485,658.59, 728,483.32 and 272,426.09

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Solution

The fourth proportional to 485,658.59, 728,483.32 and 272,426.09 is: 408,636.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,658.59 : 728,483.32 = 272,426.09 : x
  2. Step 2: Convert to fraction form
    485,658.59/728,483.32 = 272,426.09/x
  3. Step 3: Cross multiply
    485,658.59x = 728,483.32 × 272,426.09
  4. Step 4: Simplify right side
    485,658.59x = 198,457,859,195.94
  5. Step 5: Solve for x
    x = 198,457,859,195.94/485,658.59
  6. Step 6: Final answer
    x = 408,636.57

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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.