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Finding the Fourth Proportional to 391,772.36, 587,313.88 and 155,281.04

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Solution

The fourth proportional to 391,772.36, 587,313.88 and 155,281.04 is: 232,784.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,772.36 : 587,313.88 = 155,281.04 : x
  2. Step 2: Convert to fraction form
    391,772.36/587,313.88 = 155,281.04/x
  3. Step 3: Cross multiply
    391,772.36x = 587,313.88 × 155,281.04
  4. Step 4: Simplify right side
    391,772.36x = 91,198,710,092.84
  5. Step 5: Solve for x
    x = 91,198,710,092.84/391,772.36
  6. Step 6: Final answer
    x = 232,784.95

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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.