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Finding the Fourth Proportional to 1,335.29, 2,003.03 and 642.24

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Solution

The fourth proportional to 1,335.29, 2,003.03 and 642.24 is: 963.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.29 : 2,003.03 = 642.24 : x
  2. Step 2: Convert to fraction form
    1,335.29/2,003.03 = 642.24/x
  3. Step 3: Cross multiply
    1,335.29x = 2,003.03 × 642.24
  4. Step 4: Simplify right side
    1,335.29x = 1,286,422.78
  5. Step 5: Solve for x
    x = 1,286,422.78/1,335.29
  6. Step 6: Final answer
    x = 963.41

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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.