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Finding the Fourth Proportional to 390,179.48, 585,289.62 and 123,960.92

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Solution

The fourth proportional to 390,179.48, 585,289.62 and 123,960.92 is: 185,947.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,179.48 : 585,289.62 = 123,960.92 : x
  2. Step 2: Convert to fraction form
    390,179.48/585,289.62 = 123,960.92/x
  3. Step 3: Cross multiply
    390,179.48x = 585,289.62 × 123,960.92
  4. Step 4: Simplify right side
    390,179.48x = 72,553,039,761.65
  5. Step 5: Solve for x
    x = 72,553,039,761.65/390,179.48
  6. Step 6: Final answer
    x = 185,947.86

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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.