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Finding the Fourth Proportional to 692.55, 953.78 and 677.43

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Solution

The fourth proportional to 692.55, 953.78 and 677.43 is: 932.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.55 : 953.78 = 677.43 : x
  2. Step 2: Convert to fraction form
    692.55/953.78 = 677.43/x
  3. Step 3: Cross multiply
    692.55x = 953.78 × 677.43
  4. Step 4: Simplify right side
    692.55x = 646,115.80
  5. Step 5: Solve for x
    x = 646,115.80/692.55
  6. Step 6: Final answer
    x = 932.95

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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.