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Finding the Fourth Proportional to 391,969.10, 587,807.85 and 155,262.80

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Solution

The fourth proportional to 391,969.10, 587,807.85 and 155,262.80 is: 232,836.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,969.10 : 587,807.85 = 155,262.80 : x
  2. Step 2: Convert to fraction form
    391,969.10/587,807.85 = 155,262.80/x
  3. Step 3: Cross multiply
    391,969.10x = 587,807.85 × 155,262.80
  4. Step 4: Simplify right side
    391,969.10x = 91,264,692,652.98
  5. Step 5: Solve for x
    x = 91,264,692,652.98/391,969.10
  6. Step 6: Final answer
    x = 232,836.45

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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.