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Finding the Fourth Proportional to 1,128.86, 1,692.44 and 850.92

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Solution

The fourth proportional to 1,128.86, 1,692.44 and 850.92 is: 1,275.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.86 : 1,692.44 = 850.92 : x
  2. Step 2: Convert to fraction form
    1,128.86/1,692.44 = 850.92/x
  3. Step 3: Cross multiply
    1,128.86x = 1,692.44 × 850.92
  4. Step 4: Simplify right side
    1,128.86x = 1,440,126.79
  5. Step 5: Solve for x
    x = 1,440,126.79/1,128.86
  6. Step 6: Final answer
    x = 1,275.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.