Home / 1,214.38-1,821.66-392.59

Finding the Fourth Proportional to 1,214.38, 1,821.66 and 392.59

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Solution

The fourth proportional to 1,214.38, 1,821.66 and 392.59 is: 588.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.38 : 1,821.66 = 392.59 : x
  2. Step 2: Convert to fraction form
    1,214.38/1,821.66 = 392.59/x
  3. Step 3: Cross multiply
    1,214.38x = 1,821.66 × 392.59
  4. Step 4: Simplify right side
    1,214.38x = 715,165.50
  5. Step 5: Solve for x
    x = 715,165.50/1,214.38
  6. Step 6: Final answer
    x = 588.91

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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.