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Finding the Fourth Proportional to 2,867.68, 4,301.52 and 815.68

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Solution

The fourth proportional to 2,867.68, 4,301.52 and 815.68 is: 1,223.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,867.68 : 4,301.52 = 815.68 : x
  2. Step 2: Convert to fraction form
    2,867.68/4,301.52 = 815.68/x
  3. Step 3: Cross multiply
    2,867.68x = 4,301.52 × 815.68
  4. Step 4: Simplify right side
    2,867.68x = 3,508,663.83
  5. Step 5: Solve for x
    x = 3,508,663.83/2,867.68
  6. Step 6: Final answer
    x = 1,223.52

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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.