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Finding the Fourth Proportional to 259,573.20, 389,489.40 and 147,339.60

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Solution

The fourth proportional to 259,573.20, 389,489.40 and 147,339.60 is: 221,082.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,573.20 : 389,489.40 = 147,339.60 : x
  2. Step 2: Convert to fraction form
    259,573.20/389,489.40 = 147,339.60/x
  3. Step 3: Cross multiply
    259,573.20x = 389,489.40 × 147,339.60
  4. Step 4: Simplify right side
    259,573.20x = 57,387,212,400.24
  5. Step 5: Solve for x
    x = 57,387,212,400.24/259,573.20
  6. Step 6: Final answer
    x = 221,082.96

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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.