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Finding the Fourth Proportional to 716.50, 985.98 and 692.74

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Solution

The fourth proportional to 716.50, 985.98 and 692.74 is: 953.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.50 : 985.98 = 692.74 : x
  2. Step 2: Convert to fraction form
    716.50/985.98 = 692.74/x
  3. Step 3: Cross multiply
    716.50x = 985.98 × 692.74
  4. Step 4: Simplify right side
    716.50x = 683,027.79
  5. Step 5: Solve for x
    x = 683,027.79/716.50
  6. Step 6: Final answer
    x = 953.28

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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.