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Finding the Fourth Proportional to 391,699.01, 540,496.26 and 238,681.44

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Solution

The fourth proportional to 391,699.01, 540,496.26 and 238,681.44 is: 329,350.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,699.01 : 540,496.26 = 238,681.44 : x
  2. Step 2: Convert to fraction form
    391,699.01/540,496.26 = 238,681.44/x
  3. Step 3: Cross multiply
    391,699.01x = 540,496.26 × 238,681.44
  4. Step 4: Simplify right side
    391,699.01x = 129,006,425,651.41
  5. Step 5: Solve for x
    x = 129,006,425,651.41/391,699.01
  6. Step 6: Final answer
    x = 329,350.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.