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Finding the Fourth Proportional to 391,716.60, 587,459.70 and 154,980.60

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Solution

The fourth proportional to 391,716.60, 587,459.70 and 154,980.60 is: 232,425.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,716.60 : 587,459.70 = 154,980.60 : x
  2. Step 2: Convert to fraction form
    391,716.60/587,459.70 = 154,980.60/x
  3. Step 3: Cross multiply
    391,716.60x = 587,459.70 × 154,980.60
  4. Step 4: Simplify right side
    391,716.60x = 91,044,856,781.82
  5. Step 5: Solve for x
    x = 91,044,856,781.82/391,716.60
  6. Step 6: Final answer
    x = 232,425.32

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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.