Home / 1,214.48-1,821.78-392.82

Finding the Fourth Proportional to 1,214.48, 1,821.78 and 392.82

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Solution

The fourth proportional to 1,214.48, 1,821.78 and 392.82 is: 589.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.48 : 1,821.78 = 392.82 : x
  2. Step 2: Convert to fraction form
    1,214.48/1,821.78 = 392.82/x
  3. Step 3: Cross multiply
    1,214.48x = 1,821.78 × 392.82
  4. Step 4: Simplify right side
    1,214.48x = 715,631.62
  5. Step 5: Solve for x
    x = 715,631.62/1,214.48
  6. Step 6: Final answer
    x = 589.25

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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.