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Finding the Fourth Proportional to 955.14, 1,317.87 and 692.70

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Solution

The fourth proportional to 955.14, 1,317.87 and 692.70 is: 955.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.14 : 1,317.87 = 692.70 : x
  2. Step 2: Convert to fraction form
    955.14/1,317.87 = 692.70/x
  3. Step 3: Cross multiply
    955.14x = 1,317.87 × 692.70
  4. Step 4: Simplify right side
    955.14x = 912,888.55
  5. Step 5: Solve for x
    x = 912,888.55/955.14
  6. Step 6: Final answer
    x = 955.76

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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.