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Finding the Fourth Proportional to 1,561.00, 2,339.88 and 738.65

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Solution

The fourth proportional to 1,561.00, 2,339.88 and 738.65 is: 1,107.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.00 : 2,339.88 = 738.65 : x
  2. Step 2: Convert to fraction form
    1,561.00/2,339.88 = 738.65/x
  3. Step 3: Cross multiply
    1,561.00x = 2,339.88 × 738.65
  4. Step 4: Simplify right side
    1,561.00x = 1,728,336.97
  5. Step 5: Solve for x
    x = 1,728,336.97/1,561.00
  6. Step 6: Final answer
    x = 1,107.20

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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.