Home / 1,146.12-1,719.29-324.39

Finding the Fourth Proportional to 1,146.12, 1,719.29 and 324.39

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Solution

The fourth proportional to 1,146.12, 1,719.29 and 324.39 is: 486.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.12 : 1,719.29 = 324.39 : x
  2. Step 2: Convert to fraction form
    1,146.12/1,719.29 = 324.39/x
  3. Step 3: Cross multiply
    1,146.12x = 1,719.29 × 324.39
  4. Step 4: Simplify right side
    1,146.12x = 557,718.86
  5. Step 5: Solve for x
    x = 557,718.86/1,146.12
  6. Step 6: Final answer
    x = 486.61

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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.