Home / 1,217.44-1,680.20-745.65

Finding the Fourth Proportional to 1,217.44, 1,680.20 and 745.65

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Solution

The fourth proportional to 1,217.44, 1,680.20 and 745.65 is: 1,029.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.44 : 1,680.20 = 745.65 : x
  2. Step 2: Convert to fraction form
    1,217.44/1,680.20 = 745.65/x
  3. Step 3: Cross multiply
    1,217.44x = 1,680.20 × 745.65
  4. Step 4: Simplify right side
    1,217.44x = 1,252,841.13
  5. Step 5: Solve for x
    x = 1,252,841.13/1,217.44
  6. Step 6: Final answer
    x = 1,029.08

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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.