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Finding the Fourth Proportional to 1,549.83, 2,138.95 and 886.78

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Solution

The fourth proportional to 1,549.83, 2,138.95 and 886.78 is: 1,223.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,549.83 : 2,138.95 = 886.78 : x
  2. Step 2: Convert to fraction form
    1,549.83/2,138.95 = 886.78/x
  3. Step 3: Cross multiply
    1,549.83x = 2,138.95 × 886.78
  4. Step 4: Simplify right side
    1,549.83x = 1,896,776.88
  5. Step 5: Solve for x
    x = 1,896,776.88/1,549.83
  6. Step 6: Final answer
    x = 1,223.86

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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.