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Finding the Fourth Proportional to 1,691.43, 2,333.95 and 945.36

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Solution

The fourth proportional to 1,691.43, 2,333.95 and 945.36 is: 1,304.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.43 : 2,333.95 = 945.36 : x
  2. Step 2: Convert to fraction form
    1,691.43/2,333.95 = 945.36/x
  3. Step 3: Cross multiply
    1,691.43x = 2,333.95 × 945.36
  4. Step 4: Simplify right side
    1,691.43x = 2,206,422.97
  5. Step 5: Solve for x
    x = 2,206,422.97/1,691.43
  6. Step 6: Final answer
    x = 1,304.47

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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.