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Finding the Fourth Proportional to 769.38, 1,159.46 and 692.44

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Solution

The fourth proportional to 769.38, 1,159.46 and 692.44 is: 1,043.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.38 : 1,159.46 = 692.44 : x
  2. Step 2: Convert to fraction form
    769.38/1,159.46 = 692.44/x
  3. Step 3: Cross multiply
    769.38x = 1,159.46 × 692.44
  4. Step 4: Simplify right side
    769.38x = 802,856.48
  5. Step 5: Solve for x
    x = 802,856.48/769.38
  6. Step 6: Final answer
    x = 1,043.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.