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Finding the Fourth Proportional to 2,515.15, 3,774.45 and 871.71

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Solution

The fourth proportional to 2,515.15, 3,774.45 and 871.71 is: 1,308.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,515.15 : 3,774.45 = 871.71 : x
  2. Step 2: Convert to fraction form
    2,515.15/3,774.45 = 871.71/x
  3. Step 3: Cross multiply
    2,515.15x = 3,774.45 × 871.71
  4. Step 4: Simplify right side
    2,515.15x = 3,290,214.92
  5. Step 5: Solve for x
    x = 3,290,214.92/2,515.15
  6. Step 6: Final answer
    x = 1,308.16

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1.5x scale

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.