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Finding the Fourth Proportional to 553.32, 828.78 and 479.22

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Solution

The fourth proportional to 553.32, 828.78 and 479.22 is: 717.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.32 : 828.78 = 479.22 : x
  2. Step 2: Convert to fraction form
    553.32/828.78 = 479.22/x
  3. Step 3: Cross multiply
    553.32x = 828.78 × 479.22
  4. Step 4: Simplify right side
    553.32x = 397,167.95
  5. Step 5: Solve for x
    x = 397,167.95/553.32
  6. Step 6: Final answer
    x = 717.79

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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.