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Finding the Fourth Proportional to 2,951.28, 4,072.72 and 1,692.28

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Solution

The fourth proportional to 2,951.28, 4,072.72 and 1,692.28 is: 2,335.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,951.28 : 4,072.72 = 1,692.28 : x
  2. Step 2: Convert to fraction form
    2,951.28/4,072.72 = 1,692.28/x
  3. Step 3: Cross multiply
    2,951.28x = 4,072.72 × 1,692.28
  4. Step 4: Simplify right side
    2,951.28x = 6,892,182.60
  5. Step 5: Solve for x
    x = 6,892,182.60/2,951.28
  6. Step 6: Final answer
    x = 2,335.32

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1.5x scale

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.