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Finding the Fourth Proportional to 2,692.61, 4,038.13 and 1,048.79

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Solution

The fourth proportional to 2,692.61, 4,038.13 and 1,048.79 is: 1,572.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,692.61 : 4,038.13 = 1,048.79 : x
  2. Step 2: Convert to fraction form
    2,692.61/4,038.13 = 1,048.79/x
  3. Step 3: Cross multiply
    2,692.61x = 4,038.13 × 1,048.79
  4. Step 4: Simplify right side
    2,692.61x = 4,235,150.36
  5. Step 5: Solve for x
    x = 4,235,150.36/2,692.61
  6. Step 6: Final answer
    x = 1,572.88

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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.