Home / 1,252.78-1,726.94-1,031.35

Finding the Fourth Proportional to 1,252.78, 1,726.94 and 1,031.35

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Solution

The fourth proportional to 1,252.78, 1,726.94 and 1,031.35 is: 1,421.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.78 : 1,726.94 = 1,031.35 : x
  2. Step 2: Convert to fraction form
    1,252.78/1,726.94 = 1,031.35/x
  3. Step 3: Cross multiply
    1,252.78x = 1,726.94 × 1,031.35
  4. Step 4: Simplify right side
    1,252.78x = 1,781,079.57
  5. Step 5: Solve for x
    x = 1,781,079.57/1,252.78
  6. Step 6: Final answer
    x = 1,421.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.