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Finding the Fourth Proportional to 1,549.50, 2,138.76 and 959.75

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Solution

The fourth proportional to 1,549.50, 2,138.76 and 959.75 is: 1,324.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,549.50 : 2,138.76 = 959.75 : x
  2. Step 2: Convert to fraction form
    1,549.50/2,138.76 = 959.75/x
  3. Step 3: Cross multiply
    1,549.50x = 2,138.76 × 959.75
  4. Step 4: Simplify right side
    1,549.50x = 2,052,664.22
  5. Step 5: Solve for x
    x = 2,052,664.22/1,549.50
  6. Step 6: Final answer
    x = 1,324.73

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1.5x scale

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.