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Finding the Fourth Proportional to 353,674.52, 530,191.85 and 128,982.31

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Solution

The fourth proportional to 353,674.52, 530,191.85 and 128,982.31 is: 193,356.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,674.52 : 530,191.85 = 128,982.31 : x
  2. Step 2: Convert to fraction form
    353,674.52/530,191.85 = 128,982.31/x
  3. Step 3: Cross multiply
    353,674.52x = 530,191.85 × 128,982.31
  4. Step 4: Simplify right side
    353,674.52x = 68,385,367,585.78
  5. Step 5: Solve for x
    x = 68,385,367,585.78/353,674.52
  6. Step 6: Final answer
    x = 193,356.78

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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.