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Finding the Fourth Proportional to 1,339.06, 1,847.87 and 749.65

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Solution

The fourth proportional to 1,339.06, 1,847.87 and 749.65 is: 1,034.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.06 : 1,847.87 = 749.65 : x
  2. Step 2: Convert to fraction form
    1,339.06/1,847.87 = 749.65/x
  3. Step 3: Cross multiply
    1,339.06x = 1,847.87 × 749.65
  4. Step 4: Simplify right side
    1,339.06x = 1,385,255.75
  5. Step 5: Solve for x
    x = 1,385,255.75/1,339.06
  6. Step 6: Final answer
    x = 1,034.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.