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Finding the Fourth Proportional to 381,672.60, 572,336.10 and 144,936.60

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Solution

The fourth proportional to 381,672.60, 572,336.10 and 144,936.60 is: 217,339.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,672.60 : 572,336.10 = 144,936.60 : x
  2. Step 2: Convert to fraction form
    381,672.60/572,336.10 = 144,936.60/x
  3. Step 3: Cross multiply
    381,672.60x = 572,336.10 × 144,936.60
  4. Step 4: Simplify right side
    381,672.60x = 82,952,448,391.26
  5. Step 5: Solve for x
    x = 82,952,448,391.26/381,672.60
  6. Step 6: Final answer
    x = 217,339.28

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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.