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Finding the Fourth Proportional to 391,710.80, 587,652.60 and 125,483.60

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Solution

The fourth proportional to 391,710.80, 587,652.60 and 125,483.60 is: 188,253.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,710.80 : 587,652.60 = 125,483.60 : x
  2. Step 2: Convert to fraction form
    391,710.80/587,652.60 = 125,483.60/x
  3. Step 3: Cross multiply
    391,710.80x = 587,652.60 × 125,483.60
  4. Step 4: Simplify right side
    391,710.80x = 73,740,763,797.36
  5. Step 5: Solve for x
    x = 73,740,763,797.36/391,710.80
  6. Step 6: Final answer
    x = 188,253.08

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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.