Home / 1,214.33-1,821.32-392.58

Finding the Fourth Proportional to 1,214.33, 1,821.32 and 392.58

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Solution

The fourth proportional to 1,214.33, 1,821.32 and 392.58 is: 588.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.33 : 1,821.32 = 392.58 : x
  2. Step 2: Convert to fraction form
    1,214.33/1,821.32 = 392.58/x
  3. Step 3: Cross multiply
    1,214.33x = 1,821.32 × 392.58
  4. Step 4: Simplify right side
    1,214.33x = 715,011.84
  5. Step 5: Solve for x
    x = 715,011.84/1,214.33
  6. Step 6: Final answer
    x = 588.81

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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.