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Finding the Fourth Proportional to 2,116.64, 3,175.27 and 655.91

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Solution

The fourth proportional to 2,116.64, 3,175.27 and 655.91 is: 983.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.64 : 3,175.27 = 655.91 : x
  2. Step 2: Convert to fraction form
    2,116.64/3,175.27 = 655.91/x
  3. Step 3: Cross multiply
    2,116.64x = 3,175.27 × 655.91
  4. Step 4: Simplify right side
    2,116.64x = 2,082,691.35
  5. Step 5: Solve for x
    x = 2,082,691.35/2,116.64
  6. Step 6: Final answer
    x = 983.96

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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.