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Finding the Fourth Proportional to 552.39, 828.32 and 436.70

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Solution

The fourth proportional to 552.39, 828.32 and 436.70 is: 654.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.39 : 828.32 = 436.70 : x
  2. Step 2: Convert to fraction form
    552.39/828.32 = 436.70/x
  3. Step 3: Cross multiply
    552.39x = 828.32 × 436.70
  4. Step 4: Simplify right side
    552.39x = 361,721.02
  5. Step 5: Solve for x
    x = 361,721.02/552.39
  6. Step 6: Final answer
    x = 654.83

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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.