Home / 1,214.35-1,821.51-392.63

Finding the Fourth Proportional to 1,214.35, 1,821.51 and 392.63

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Solution

The fourth proportional to 1,214.35, 1,821.51 and 392.63 is: 588.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.35 : 1,821.51 = 392.63 : x
  2. Step 2: Convert to fraction form
    1,214.35/1,821.51 = 392.63/x
  3. Step 3: Cross multiply
    1,214.35x = 1,821.51 × 392.63
  4. Step 4: Simplify right side
    1,214.35x = 715,179.47
  5. Step 5: Solve for x
    x = 715,179.47/1,214.35
  6. Step 6: Final answer
    x = 588.94

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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.