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Finding the Fourth Proportional to 345,497.97, 518,290.71 and 135,108.57

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Solution

The fourth proportional to 345,497.97, 518,290.71 and 135,108.57 is: 202,679.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,497.97 : 518,290.71 = 135,108.57 : x
  2. Step 2: Convert to fraction form
    345,497.97/518,290.71 = 135,108.57/x
  3. Step 3: Cross multiply
    345,497.97x = 518,290.71 × 135,108.57
  4. Step 4: Simplify right side
    345,497.97x = 70,025,516,672.38
  5. Step 5: Solve for x
    x = 70,025,516,672.38/345,497.97
  6. Step 6: Final answer
    x = 202,679.97

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1.5x scale

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.