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Finding the Fourth Proportional to 552, 827.29 and 421.52

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Solution

The fourth proportional to 552, 827.29 and 421.52 is: 631.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    552 : 827.29 = 421.52 : x
  2. Step 2: Convert to fraction form
    552/827.29 = 421.52/x
  3. Step 3: Cross multiply
    552x = 827.29 × 421.52
  4. Step 4: Simplify right side
    552x = 348,719.28
  5. Step 5: Solve for x
    x = 348,719.28/552
  6. Step 6: Final answer
    x = 631.74

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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.