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Finding the Fourth Proportional to 1,692.78, 2,335.96 and 946.78

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Solution

The fourth proportional to 1,692.78, 2,335.96 and 946.78 is: 1,306.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,692.78 : 2,335.96 = 946.78 : x
  2. Step 2: Convert to fraction form
    1,692.78/2,335.96 = 946.78/x
  3. Step 3: Cross multiply
    1,692.78x = 2,335.96 × 946.78
  4. Step 4: Simplify right side
    1,692.78x = 2,211,640.21
  5. Step 5: Solve for x
    x = 2,211,640.21/1,692.78
  6. Step 6: Final answer
    x = 1,306.51

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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.