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Finding the Fourth Proportional to 261,838.70, 391,850.85 and 156,733.10

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Solution

The fourth proportional to 261,838.70, 391,850.85 and 156,733.10 is: 234,556.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,838.70 : 391,850.85 = 156,733.10 : x
  2. Step 2: Convert to fraction form
    261,838.70/391,850.85 = 156,733.10/x
  3. Step 3: Cross multiply
    261,838.70x = 391,850.85 × 156,733.10
  4. Step 4: Simplify right side
    261,838.70x = 61,415,998,458.14
  5. Step 5: Solve for x
    x = 61,415,998,458.14/261,838.70
  6. Step 6: Final answer
    x = 234,556.61

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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.