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Finding the Fourth Proportional to 261,817.25, 391,950.83 and 161,655.38

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Solution

The fourth proportional to 261,817.25, 391,950.83 and 161,655.38 is: 242,004.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,817.25 : 391,950.83 = 161,655.38 : x
  2. Step 2: Convert to fraction form
    261,817.25/391,950.83 = 161,655.38/x
  3. Step 3: Cross multiply
    261,817.25x = 391,950.83 × 161,655.38
  4. Step 4: Simplify right side
    261,817.25x = 63,360,960,279.17
  5. Step 5: Solve for x
    x = 63,360,960,279.17/261,817.25
  6. Step 6: Final answer
    x = 242,004.53

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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.