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Finding the Fourth Proportional to 296,779.52, 445,170 and 86,422.56

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Solution

The fourth proportional to 296,779.52, 445,170 and 86,422.56 is: 129,634.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,779.52 : 445,170 = 86,422.56 : x
  2. Step 2: Convert to fraction form
    296,779.52/445,170 = 86,422.56/x
  3. Step 3: Cross multiply
    296,779.52x = 445,170 × 86,422.56
  4. Step 4: Simplify right side
    296,779.52x = 38,472,731,035.20
  5. Step 5: Solve for x
    x = 38,472,731,035.20/296,779.52
  6. Step 6: Final answer
    x = 129,634.05

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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.