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Finding the Fourth Proportional to 330,187.70, 495,281.55 and 80,869.70

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Solution

The fourth proportional to 330,187.70, 495,281.55 and 80,869.70 is: 121,304.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,187.70 : 495,281.55 = 80,869.70 : x
  2. Step 2: Convert to fraction form
    330,187.70/495,281.55 = 80,869.70/x
  3. Step 3: Cross multiply
    330,187.70x = 495,281.55 × 80,869.70
  4. Step 4: Simplify right side
    330,187.70x = 40,053,270,364.04
  5. Step 5: Solve for x
    x = 40,053,270,364.04/330,187.70
  6. Step 6: Final answer
    x = 121,304.55

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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.