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Finding the Fourth Proportional to 522.17, 721.56 and 451.70

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Solution

The fourth proportional to 522.17, 721.56 and 451.70 is: 624.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.17 : 721.56 = 451.70 : x
  2. Step 2: Convert to fraction form
    522.17/721.56 = 451.70/x
  3. Step 3: Cross multiply
    522.17x = 721.56 × 451.70
  4. Step 4: Simplify right side
    522.17x = 325,928.65
  5. Step 5: Solve for x
    x = 325,928.65/522.17
  6. Step 6: Final answer
    x = 624.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.