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Finding the Fourth Proportional to 259,487.40, 389,449.80 and 117,551.10

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Solution

The fourth proportional to 259,487.40, 389,449.80 and 117,551.10 is: 176,425.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,487.40 : 389,449.80 = 117,551.10 : x
  2. Step 2: Convert to fraction form
    259,487.40/389,449.80 = 117,551.10/x
  3. Step 3: Cross multiply
    259,487.40x = 389,449.80 × 117,551.10
  4. Step 4: Simplify right side
    259,487.40x = 45,780,252,384.78
  5. Step 5: Solve for x
    x = 45,780,252,384.78/259,487.40
  6. Step 6: Final answer
    x = 176,425.72

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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.