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Finding the Fourth Proportional to 2,116.86, 3,175.22 and 655.62

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Solution

The fourth proportional to 2,116.86, 3,175.22 and 655.62 is: 983.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.86 : 3,175.22 = 655.62 : x
  2. Step 2: Convert to fraction form
    2,116.86/3,175.22 = 655.62/x
  3. Step 3: Cross multiply
    2,116.86x = 3,175.22 × 655.62
  4. Step 4: Simplify right side
    2,116.86x = 2,081,718.58
  5. Step 5: Solve for x
    x = 2,081,718.58/2,116.86
  6. Step 6: Final answer
    x = 983.40

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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.