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Finding the Fourth Proportional to 2,867.25, 4,300.89 and 815.25

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Solution

The fourth proportional to 2,867.25, 4,300.89 and 815.25 is: 1,222.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,867.25 : 4,300.89 = 815.25 : x
  2. Step 2: Convert to fraction form
    2,867.25/4,300.89 = 815.25/x
  3. Step 3: Cross multiply
    2,867.25x = 4,300.89 × 815.25
  4. Step 4: Simplify right side
    2,867.25x = 3,506,300.57
  5. Step 5: Solve for x
    x = 3,506,300.57/2,867.25
  6. Step 6: Final answer
    x = 1,222.88

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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.