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Finding the Fourth Proportional to 1,478.26, 2,217.96 and 554.23

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Solution

The fourth proportional to 1,478.26, 2,217.96 and 554.23 is: 831.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.26 : 2,217.96 = 554.23 : x
  2. Step 2: Convert to fraction form
    1,478.26/2,217.96 = 554.23/x
  3. Step 3: Cross multiply
    1,478.26x = 2,217.96 × 554.23
  4. Step 4: Simplify right side
    1,478.26x = 1,229,260.66
  5. Step 5: Solve for x
    x = 1,229,260.66/1,478.26
  6. Step 6: Final answer
    x = 831.56

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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.