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Finding the Fourth Proportional to 261,011.40, 391,808.70 and 243,879.90

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Solution

The fourth proportional to 261,011.40, 391,808.70 and 243,879.90 is: 366,092.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,011.40 : 391,808.70 = 243,879.90 : x
  2. Step 2: Convert to fraction form
    261,011.40/391,808.70 = 243,879.90/x
  3. Step 3: Cross multiply
    261,011.40x = 391,808.70 × 243,879.90
  4. Step 4: Simplify right side
    261,011.40x = 95,554,266,575.13
  5. Step 5: Solve for x
    x = 95,554,266,575.13/261,011.40
  6. Step 6: Final answer
    x = 366,092.31

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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.