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Finding the Fourth Proportional to 391,514.20, 587,271.30 and 166,816.60

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Solution

The fourth proportional to 391,514.20, 587,271.30 and 166,816.60 is: 250,224.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,514.20 : 587,271.30 = 166,816.60 : x
  2. Step 2: Convert to fraction form
    391,514.20/587,271.30 = 166,816.60/x
  3. Step 3: Cross multiply
    391,514.20x = 587,271.30 × 166,816.60
  4. Step 4: Simplify right side
    391,514.20x = 97,966,601,543.58
  5. Step 5: Solve for x
    x = 97,966,601,543.58/391,514.20
  6. Step 6: Final answer
    x = 250,224.90

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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.