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Finding the Fourth Proportional to 401,439.60, 602,160.44 and 135,387

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Solution

The fourth proportional to 401,439.60, 602,160.44 and 135,387 is: 203,080.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,439.60 : 602,160.44 = 135,387 : x
  2. Step 2: Convert to fraction form
    401,439.60/602,160.44 = 135,387/x
  3. Step 3: Cross multiply
    401,439.60x = 602,160.44 × 135,387
  4. Step 4: Simplify right side
    401,439.60x = 81,524,694,813.35
  5. Step 5: Solve for x
    x = 81,524,694,813.35/401,439.60
  6. Step 6: Final answer
    x = 203,080.85

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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.