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Finding the Fourth Proportional to 660,771.60, 991,195.08 and 187,419.76

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Solution

The fourth proportional to 660,771.60, 991,195.08 and 187,419.76 is: 281,140.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,771.60 : 991,195.08 = 187,419.76 : x
  2. Step 2: Convert to fraction form
    660,771.60/991,195.08 = 187,419.76/x
  3. Step 3: Cross multiply
    660,771.60x = 991,195.08 × 187,419.76
  4. Step 4: Simplify right side
    660,771.60x = 185,769,544,006.78
  5. Step 5: Solve for x
    x = 185,769,544,006.78/660,771.60
  6. Step 6: Final answer
    x = 281,140.33

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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.