Home / 1,217.16-1,679.72-745.05

Finding the Fourth Proportional to 1,217.16, 1,679.72 and 745.05

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Solution

The fourth proportional to 1,217.16, 1,679.72 and 745.05 is: 1,028.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.16 : 1,679.72 = 745.05 : x
  2. Step 2: Convert to fraction form
    1,217.16/1,679.72 = 745.05/x
  3. Step 3: Cross multiply
    1,217.16x = 1,679.72 × 745.05
  4. Step 4: Simplify right side
    1,217.16x = 1,251,467.46
  5. Step 5: Solve for x
    x = 1,251,467.46/1,217.16
  6. Step 6: Final answer
    x = 1,028.18

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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.