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Finding the Fourth Proportional to 3,558, 5,315.40 and 2,974.80

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Solution

The fourth proportional to 3,558, 5,315.40 and 2,974.80 is: 4,444.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,558 : 5,315.40 = 2,974.80 : x
  2. Step 2: Convert to fraction form
    3,558/5,315.40 = 2,974.80/x
  3. Step 3: Cross multiply
    3,558x = 5,315.40 × 2,974.80
  4. Step 4: Simplify right side
    3,558x = 15,812,251.92
  5. Step 5: Solve for x
    x = 15,812,251.92/3,558
  6. Step 6: Final answer
    x = 4,444.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.