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Finding the Fourth Proportional to 261,046.60, 391,569.90 and 181,330.45

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Solution

The fourth proportional to 261,046.60, 391,569.90 and 181,330.45 is: 271,995.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,046.60 : 391,569.90 = 181,330.45 : x
  2. Step 2: Convert to fraction form
    261,046.60/391,569.90 = 181,330.45/x
  3. Step 3: Cross multiply
    261,046.60x = 391,569.90 × 181,330.45
  4. Step 4: Simplify right side
    261,046.60x = 71,003,546,173.46
  5. Step 5: Solve for x
    x = 71,003,546,173.46/261,046.60
  6. Step 6: Final answer
    x = 271,995.68

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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.