Home / 1,215.19-1,822.38-484.57

Finding the Fourth Proportional to 1,215.19, 1,822.38 and 484.57

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Solution

The fourth proportional to 1,215.19, 1,822.38 and 484.57 is: 726.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.19 : 1,822.38 = 484.57 : x
  2. Step 2: Convert to fraction form
    1,215.19/1,822.38 = 484.57/x
  3. Step 3: Cross multiply
    1,215.19x = 1,822.38 × 484.57
  4. Step 4: Simplify right side
    1,215.19x = 883,070.68
  5. Step 5: Solve for x
    x = 883,070.68/1,215.19
  6. Step 6: Final answer
    x = 726.69

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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.