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Finding the Fourth Proportional to 343,842.70, 515,876.10 and 172,976.23

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Solution

The fourth proportional to 343,842.70, 515,876.10 and 172,976.23 is: 259,520.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,842.70 : 515,876.10 = 172,976.23 : x
  2. Step 2: Convert to fraction form
    343,842.70/515,876.10 = 172,976.23/x
  3. Step 3: Cross multiply
    343,842.70x = 515,876.10 × 172,976.23
  4. Step 4: Simplify right side
    343,842.70x = 89,234,302,925.10
  5. Step 5: Solve for x
    x = 89,234,302,925.10/343,842.70
  6. Step 6: Final answer
    x = 259,520.72

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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.