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Finding the Fourth Proportional to 330,612.28, 495,965.12 and 105,920.15

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Solution

The fourth proportional to 330,612.28, 495,965.12 and 105,920.15 is: 158,895.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,612.28 : 495,965.12 = 105,920.15 : x
  2. Step 2: Convert to fraction form
    330,612.28/495,965.12 = 105,920.15/x
  3. Step 3: Cross multiply
    330,612.28x = 495,965.12 × 105,920.15
  4. Step 4: Simplify right side
    330,612.28x = 52,532,699,375.57
  5. Step 5: Solve for x
    x = 52,532,699,375.57/330,612.28
  6. Step 6: Final answer
    x = 158,895.19

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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.