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Finding the Fourth Proportional to 408,171.48, 612,535.86 and 141,929.34

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Solution

The fourth proportional to 408,171.48, 612,535.86 and 141,929.34 is: 212,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,171.48 : 612,535.86 = 141,929.34 : x
  2. Step 2: Convert to fraction form
    408,171.48/612,535.86 = 141,929.34/x
  3. Step 3: Cross multiply
    408,171.48x = 612,535.86 × 141,929.34
  4. Step 4: Simplify right side
    408,171.48x = 86,936,810,336.13
  5. Step 5: Solve for x
    x = 86,936,810,336.13/408,171.48
  6. Step 6: Final answer
    x = 212,990.90

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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.