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Finding the Fourth Proportional to 296,732.88, 445,172.28 and 86,372.64

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Solution

The fourth proportional to 296,732.88, 445,172.28 and 86,372.64 is: 129,580.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,732.88 : 445,172.28 = 86,372.64 : x
  2. Step 2: Convert to fraction form
    296,732.88/445,172.28 = 86,372.64/x
  3. Step 3: Cross multiply
    296,732.88x = 445,172.28 × 86,372.64
  4. Step 4: Simplify right side
    296,732.88x = 38,450,705,078.42
  5. Step 5: Solve for x
    x = 38,450,705,078.42/296,732.88
  6. Step 6: Final answer
    x = 129,580.20

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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.