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Finding the Fourth Proportional to 1,425.28, 1,966.44 and 959.80

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Solution

The fourth proportional to 1,425.28, 1,966.44 and 959.80 is: 1,324.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.28 : 1,966.44 = 959.80 : x
  2. Step 2: Convert to fraction form
    1,425.28/1,966.44 = 959.80/x
  3. Step 3: Cross multiply
    1,425.28x = 1,966.44 × 959.80
  4. Step 4: Simplify right side
    1,425.28x = 1,887,389.11
  5. Step 5: Solve for x
    x = 1,887,389.11/1,425.28
  6. Step 6: Final answer
    x = 1,324.22

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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.