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Finding the Fourth Proportional to 343,932.40, 515,725.80 and 156,732.40

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Solution

The fourth proportional to 343,932.40, 515,725.80 and 156,732.40 is: 235,019.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,932.40 : 515,725.80 = 156,732.40 : x
  2. Step 2: Convert to fraction form
    343,932.40/515,725.80 = 156,732.40/x
  3. Step 3: Cross multiply
    343,932.40x = 515,725.80 × 156,732.40
  4. Step 4: Simplify right side
    343,932.40x = 80,830,942,375.92
  5. Step 5: Solve for x
    x = 80,830,942,375.92/343,932.40
  6. Step 6: Final answer
    x = 235,019.85

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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.