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Finding the Fourth Proportional to 1,422.67, 1,963.57 and 925.74

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Solution

The fourth proportional to 1,422.67, 1,963.57 and 925.74 is: 1,277.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.67 : 1,963.57 = 925.74 : x
  2. Step 2: Convert to fraction form
    1,422.67/1,963.57 = 925.74/x
  3. Step 3: Cross multiply
    1,422.67x = 1,963.57 × 925.74
  4. Step 4: Simplify right side
    1,422.67x = 1,817,755.29
  5. Step 5: Solve for x
    x = 1,817,755.29/1,422.67
  6. Step 6: Final answer
    x = 1,277.71

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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.