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Finding the Fourth Proportional to 1,563.39, 2,344.22 and 639.59

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Solution

The fourth proportional to 1,563.39, 2,344.22 and 639.59 is: 959.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.39 : 2,344.22 = 639.59 : x
  2. Step 2: Convert to fraction form
    1,563.39/2,344.22 = 639.59/x
  3. Step 3: Cross multiply
    1,563.39x = 2,344.22 × 639.59
  4. Step 4: Simplify right side
    1,563.39x = 1,499,342.33
  5. Step 5: Solve for x
    x = 1,499,342.33/1,563.39
  6. Step 6: Final answer
    x = 959.04

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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.