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Finding the Fourth Proportional to 485,834.31, 728,725.20 and 148,875.94

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Solution

The fourth proportional to 485,834.31, 728,725.20 and 148,875.94 is: 223,305.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,834.31 : 728,725.20 = 148,875.94 : x
  2. Step 2: Convert to fraction form
    485,834.31/728,725.20 = 148,875.94/x
  3. Step 3: Cross multiply
    485,834.31x = 728,725.20 × 148,875.94
  4. Step 4: Simplify right side
    485,834.31x = 108,489,649,151.69
  5. Step 5: Solve for x
    x = 108,489,649,151.69/485,834.31
  6. Step 6: Final answer
    x = 223,305.86

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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.