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Finding the Fourth Proportional to 715.03, 991.59 and 692.55

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Solution

The fourth proportional to 715.03, 991.59 and 692.55 is: 960.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.03 : 991.59 = 692.55 : x
  2. Step 2: Convert to fraction form
    715.03/991.59 = 692.55/x
  3. Step 3: Cross multiply
    715.03x = 991.59 × 692.55
  4. Step 4: Simplify right side
    715.03x = 686,726.95
  5. Step 5: Solve for x
    x = 686,726.95/715.03
  6. Step 6: Final answer
    x = 960.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.