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Finding the Fourth Proportional to 1,691.31, 2,334.10 and 945.27

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Solution

The fourth proportional to 1,691.31, 2,334.10 and 945.27 is: 1,304.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.31 : 2,334.10 = 945.27 : x
  2. Step 2: Convert to fraction form
    1,691.31/2,334.10 = 945.27/x
  3. Step 3: Cross multiply
    1,691.31x = 2,334.10 × 945.27
  4. Step 4: Simplify right side
    1,691.31x = 2,206,354.71
  5. Step 5: Solve for x
    x = 2,206,354.71/1,691.31
  6. Step 6: Final answer
    x = 1,304.52

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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.