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Finding the Fourth Proportional to 343,390.20, 515,085.30 and 231,415.80

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Solution

The fourth proportional to 343,390.20, 515,085.30 and 231,415.80 is: 347,123.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,390.20 : 515,085.30 = 231,415.80 : x
  2. Step 2: Convert to fraction form
    343,390.20/515,085.30 = 231,415.80/x
  3. Step 3: Cross multiply
    343,390.20x = 515,085.30 × 231,415.80
  4. Step 4: Simplify right side
    343,390.20x = 119,198,876,767.74
  5. Step 5: Solve for x
    x = 119,198,876,767.74/343,390.20
  6. Step 6: Final answer
    x = 347,123.70

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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.