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Finding the Fourth Proportional to 296,989.28, 445,476.50 and 86,629.04

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Solution

The fourth proportional to 296,989.28, 445,476.50 and 86,629.04 is: 129,941.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,989.28 : 445,476.50 = 86,629.04 : x
  2. Step 2: Convert to fraction form
    296,989.28/445,476.50 = 86,629.04/x
  3. Step 3: Cross multiply
    296,989.28x = 445,476.50 × 86,629.04
  4. Step 4: Simplify right side
    296,989.28x = 38,591,201,537.56
  5. Step 5: Solve for x
    x = 38,591,201,537.56/296,989.28
  6. Step 6: Final answer
    x = 129,941.40

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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.