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Finding the Fourth Proportional to 2,259.28, 3,389 and 615.86

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Solution

The fourth proportional to 2,259.28, 3,389 and 615.86 is: 923.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,259.28 : 3,389 = 615.86 : x
  2. Step 2: Convert to fraction form
    2,259.28/3,389 = 615.86/x
  3. Step 3: Cross multiply
    2,259.28x = 3,389 × 615.86
  4. Step 4: Simplify right side
    2,259.28x = 2,087,149.54
  5. Step 5: Solve for x
    x = 2,087,149.54/2,259.28
  6. Step 6: Final answer
    x = 923.81

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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.