Home / 1,339.11-1,847.80-749.50

Finding the Fourth Proportional to 1,339.11, 1,847.80 and 749.50

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Solution

The fourth proportional to 1,339.11, 1,847.80 and 749.50 is: 1,034.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.11 : 1,847.80 = 749.50 : x
  2. Step 2: Convert to fraction form
    1,339.11/1,847.80 = 749.50/x
  3. Step 3: Cross multiply
    1,339.11x = 1,847.80 × 749.50
  4. Step 4: Simplify right side
    1,339.11x = 1,384,926.10
  5. Step 5: Solve for x
    x = 1,384,926.10/1,339.11
  6. Step 6: Final answer
    x = 1,034.21

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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.