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Finding the Fourth Proportional to 894.56, 1,339.03 and 615.28

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Solution

The fourth proportional to 894.56, 1,339.03 and 615.28 is: 920.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.56 : 1,339.03 = 615.28 : x
  2. Step 2: Convert to fraction form
    894.56/1,339.03 = 615.28/x
  3. Step 3: Cross multiply
    894.56x = 1,339.03 × 615.28
  4. Step 4: Simplify right side
    894.56x = 823,876.84
  5. Step 5: Solve for x
    x = 823,876.84/894.56
  6. Step 6: Final answer
    x = 920.99

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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.