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Finding the Fourth Proportional to 408,432.32, 612,677.72 and 108,911.32

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Solution

The fourth proportional to 408,432.32, 612,677.72 and 108,911.32 is: 163,374.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,432.32 : 612,677.72 = 108,911.32 : x
  2. Step 2: Convert to fraction form
    408,432.32/612,677.72 = 108,911.32/x
  3. Step 3: Cross multiply
    408,432.32x = 612,677.72 × 108,911.32
  4. Step 4: Simplify right side
    408,432.32x = 66,727,539,219.79
  5. Step 5: Solve for x
    x = 66,727,539,219.79/408,432.32
  6. Step 6: Final answer
    x = 163,374.78

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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.