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Finding the Fourth Proportional to 2,815.96, 3,887.12 and 2,520.71

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Solution

The fourth proportional to 2,815.96, 3,887.12 and 2,520.71 is: 3,479.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.96 : 3,887.12 = 2,520.71 : x
  2. Step 2: Convert to fraction form
    2,815.96/3,887.12 = 2,520.71/x
  3. Step 3: Cross multiply
    2,815.96x = 3,887.12 × 2,520.71
  4. Step 4: Simplify right side
    2,815.96x = 9,798,302.26
  5. Step 5: Solve for x
    x = 9,798,302.26/2,815.96
  6. Step 6: Final answer
    x = 3,479.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.