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Finding the Fourth Proportional to 1,478.07, 2,217.97 and 554.27

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Solution

The fourth proportional to 1,478.07, 2,217.97 and 554.27 is: 831.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.07 : 2,217.97 = 554.27 : x
  2. Step 2: Convert to fraction form
    1,478.07/2,217.97 = 554.27/x
  3. Step 3: Cross multiply
    1,478.07x = 2,217.97 × 554.27
  4. Step 4: Simplify right side
    1,478.07x = 1,229,360.99
  5. Step 5: Solve for x
    x = 1,229,360.99/1,478.07
  6. Step 6: Final answer
    x = 831.73

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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.