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Finding the Fourth Proportional to 343,939.90, 515,737.05 and 156,739.90

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Solution

The fourth proportional to 343,939.90, 515,737.05 and 156,739.90 is: 235,031.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,939.90 : 515,737.05 = 156,739.90 : x
  2. Step 2: Convert to fraction form
    343,939.90/515,737.05 = 156,739.90/x
  3. Step 3: Cross multiply
    343,939.90x = 515,737.05 × 156,739.90
  4. Step 4: Simplify right side
    343,939.90x = 80,836,573,643.30
  5. Step 5: Solve for x
    x = 80,836,573,643.30/343,939.90
  6. Step 6: Final answer
    x = 235,031.10

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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.