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Finding the Fourth Proportional to 1,254.28, 1,729.72 and 992.92

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Solution

The fourth proportional to 1,254.28, 1,729.72 and 992.92 is: 1,369.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.28 : 1,729.72 = 992.92 : x
  2. Step 2: Convert to fraction form
    1,254.28/1,729.72 = 992.92/x
  3. Step 3: Cross multiply
    1,254.28x = 1,729.72 × 992.92
  4. Step 4: Simplify right side
    1,254.28x = 1,717,473.58
  5. Step 5: Solve for x
    x = 1,717,473.58/1,254.28
  6. Step 6: Final answer
    x = 1,369.29

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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.