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Finding the Fourth Proportional to 2,474.75, 3,711.56 and 719.78

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Solution

The fourth proportional to 2,474.75, 3,711.56 and 719.78 is: 1,079.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,474.75 : 3,711.56 = 719.78 : x
  2. Step 2: Convert to fraction form
    2,474.75/3,711.56 = 719.78/x
  3. Step 3: Cross multiply
    2,474.75x = 3,711.56 × 719.78
  4. Step 4: Simplify right side
    2,474.75x = 2,671,484.50
  5. Step 5: Solve for x
    x = 2,671,484.50/2,474.75
  6. Step 6: Final answer
    x = 1,079.50

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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.