Home / 1,387.17-2,087.71-1,042.29

Finding the Fourth Proportional to 1,387.17, 2,087.71 and 1,042.29

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Solution

The fourth proportional to 1,387.17, 2,087.71 and 1,042.29 is: 1,568.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.17 : 2,087.71 = 1,042.29 : x
  2. Step 2: Convert to fraction form
    1,387.17/2,087.71 = 1,042.29/x
  3. Step 3: Cross multiply
    1,387.17x = 2,087.71 × 1,042.29
  4. Step 4: Simplify right side
    1,387.17x = 2,175,996.65
  5. Step 5: Solve for x
    x = 2,175,996.65/1,387.17
  6. Step 6: Final answer
    x = 1,568.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.