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Finding the Fourth Proportional to 381,611.40, 572,417.10 and 115,344.15

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Solution

The fourth proportional to 381,611.40, 572,417.10 and 115,344.15 is: 173,016.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,611.40 : 572,417.10 = 115,344.15 : x
  2. Step 2: Convert to fraction form
    381,611.40/572,417.10 = 115,344.15/x
  3. Step 3: Cross multiply
    381,611.40x = 572,417.10 × 115,344.15
  4. Step 4: Simplify right side
    381,611.40x = 66,024,963,844.97
  5. Step 5: Solve for x
    x = 66,024,963,844.97/381,611.40
  6. Step 6: Final answer
    x = 173,016.23

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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.