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Finding the Fourth Proportional to 691.56, 1,032.86 and 626.43

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Solution

The fourth proportional to 691.56, 1,032.86 and 626.43 is: 935.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.56 : 1,032.86 = 626.43 : x
  2. Step 2: Convert to fraction form
    691.56/1,032.86 = 626.43/x
  3. Step 3: Cross multiply
    691.56x = 1,032.86 × 626.43
  4. Step 4: Simplify right side
    691.56x = 647,014.49
  5. Step 5: Solve for x
    x = 647,014.49/691.56
  6. Step 6: Final answer
    x = 935.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.