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Finding the Fourth Proportional to 391,949.76, 587,963.52 and 155,455.68

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Solution

The fourth proportional to 391,949.76, 587,963.52 and 155,455.68 is: 233,198.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,949.76 : 587,963.52 = 155,455.68 : x
  2. Step 2: Convert to fraction form
    391,949.76/587,963.52 = 155,455.68/x
  3. Step 3: Cross multiply
    391,949.76x = 587,963.52 × 155,455.68
  4. Step 4: Simplify right side
    391,949.76x = 91,402,268,816.79
  5. Step 5: Solve for x
    x = 91,402,268,816.79/391,949.76
  6. Step 6: Final answer
    x = 233,198.94

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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.