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Finding the Fourth Proportional to 2,692.95, 4,039.46 and 718.57

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Solution

The fourth proportional to 2,692.95, 4,039.46 and 718.57 is: 1,077.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,692.95 : 4,039.46 = 718.57 : x
  2. Step 2: Convert to fraction form
    2,692.95/4,039.46 = 718.57/x
  3. Step 3: Cross multiply
    2,692.95x = 4,039.46 × 718.57
  4. Step 4: Simplify right side
    2,692.95x = 2,902,634.77
  5. Step 5: Solve for x
    x = 2,902,634.77/2,692.95
  6. Step 6: Final answer
    x = 1,077.86

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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.