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Finding the Fourth Proportional to 909.32, 1,255.30 and 694.87

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Solution

The fourth proportional to 909.32, 1,255.30 and 694.87 is: 959.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.32 : 1,255.30 = 694.87 : x
  2. Step 2: Convert to fraction form
    909.32/1,255.30 = 694.87/x
  3. Step 3: Cross multiply
    909.32x = 1,255.30 × 694.87
  4. Step 4: Simplify right side
    909.32x = 872,265.44
  5. Step 5: Solve for x
    x = 872,265.44/909.32
  6. Step 6: Final answer
    x = 959.26

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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.