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Finding the Fourth Proportional to 2,810.72, 4,216.68 and 863.08

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Solution

The fourth proportional to 2,810.72, 4,216.68 and 863.08 is: 1,294.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.72 : 4,216.68 = 863.08 : x
  2. Step 2: Convert to fraction form
    2,810.72/4,216.68 = 863.08/x
  3. Step 3: Cross multiply
    2,810.72x = 4,216.68 × 863.08
  4. Step 4: Simplify right side
    2,810.72x = 3,639,332.17
  5. Step 5: Solve for x
    x = 3,639,332.17/2,810.72
  6. Step 6: Final answer
    x = 1,294.80

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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.