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Finding the Fourth Proportional to 485,972.38, 728,875.49 and 130,903.36

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Solution

The fourth proportional to 485,972.38, 728,875.49 and 130,903.36 is: 196,332.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,972.38 : 728,875.49 = 130,903.36 : x
  2. Step 2: Convert to fraction form
    485,972.38/728,875.49 = 130,903.36/x
  3. Step 3: Cross multiply
    485,972.38x = 728,875.49 × 130,903.36
  4. Step 4: Simplify right side
    485,972.38x = 95,412,252,812.09
  5. Step 5: Solve for x
    x = 95,412,252,812.09/485,972.38
  6. Step 6: Final answer
    x = 196,332.66

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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.