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Finding the Fourth Proportional to 1,549.75, 2,138.93 and 886.63

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Solution

The fourth proportional to 1,549.75, 2,138.93 and 886.63 is: 1,223.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,549.75 : 2,138.93 = 886.63 : x
  2. Step 2: Convert to fraction form
    1,549.75/2,138.93 = 886.63/x
  3. Step 3: Cross multiply
    1,549.75x = 2,138.93 × 886.63
  4. Step 4: Simplify right side
    1,549.75x = 1,896,435.07
  5. Step 5: Solve for x
    x = 1,896,435.07/1,549.75
  6. Step 6: Final answer
    x = 1,223.70

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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.