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Finding the Fourth Proportional to 2,372.56, 3,557.32 and 986.85

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Solution

The fourth proportional to 2,372.56, 3,557.32 and 986.85 is: 1,479.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,372.56 : 3,557.32 = 986.85 : x
  2. Step 2: Convert to fraction form
    2,372.56/3,557.32 = 986.85/x
  3. Step 3: Cross multiply
    2,372.56x = 3,557.32 × 986.85
  4. Step 4: Simplify right side
    2,372.56x = 3,510,538.77
  5. Step 5: Solve for x
    x = 3,510,538.77/2,372.56
  6. Step 6: Final answer
    x = 1,479.64

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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.