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Finding the Fourth Proportional to 391,456.24, 587,276.28 and 121,570.60

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Solution

The fourth proportional to 391,456.24, 587,276.28 and 121,570.60 is: 182,384.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,456.24 : 587,276.28 = 121,570.60 : x
  2. Step 2: Convert to fraction form
    391,456.24/587,276.28 = 121,570.60/x
  3. Step 3: Cross multiply
    391,456.24x = 587,276.28 × 121,570.60
  4. Step 4: Simplify right side
    391,456.24x = 71,395,529,725.37
  5. Step 5: Solve for x
    x = 71,395,529,725.37/391,456.24
  6. Step 6: Final answer
    x = 182,384.45

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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.