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Finding the Fourth Proportional to 485,802.70, 728,725.92 and 148,818.80

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Solution

The fourth proportional to 485,802.70, 728,725.92 and 148,818.80 is: 223,234.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,802.70 : 728,725.92 = 148,818.80 : x
  2. Step 2: Convert to fraction form
    485,802.70/728,725.92 = 148,818.80/x
  3. Step 3: Cross multiply
    485,802.70x = 728,725.92 × 148,818.80
  4. Step 4: Simplify right side
    485,802.70x = 108,448,116,943.30
  5. Step 5: Solve for x
    x = 108,448,116,943.30/485,802.70
  6. Step 6: Final answer
    x = 223,234.90

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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.