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Finding the Fourth Proportional to 2,815.75, 4,224.18 and 867.88

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Solution

The fourth proportional to 2,815.75, 4,224.18 and 867.88 is: 1,301.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.75 : 4,224.18 = 867.88 : x
  2. Step 2: Convert to fraction form
    2,815.75/4,224.18 = 867.88/x
  3. Step 3: Cross multiply
    2,815.75x = 4,224.18 × 867.88
  4. Step 4: Simplify right side
    2,815.75x = 3,666,060.22
  5. Step 5: Solve for x
    x = 3,666,060.22/2,815.75
  6. Step 6: Final answer
    x = 1,301.99

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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.