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Finding the Fourth Proportional to 391,567.10, 587,350.65 and 125,336.30

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Solution

The fourth proportional to 391,567.10, 587,350.65 and 125,336.30 is: 188,004.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,567.10 : 587,350.65 = 125,336.30 : x
  2. Step 2: Convert to fraction form
    391,567.10/587,350.65 = 125,336.30/x
  3. Step 3: Cross multiply
    391,567.10x = 587,350.65 × 125,336.30
  4. Step 4: Simplify right side
    391,567.10x = 73,616,357,273.60
  5. Step 5: Solve for x
    x = 73,616,357,273.60/391,567.10
  6. Step 6: Final answer
    x = 188,004.45

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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.