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Finding the Fourth Proportional to 552.08, 826.96 and 420.68

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Solution

The fourth proportional to 552.08, 826.96 and 420.68 is: 630.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.08 : 826.96 = 420.68 : x
  2. Step 2: Convert to fraction form
    552.08/826.96 = 420.68/x
  3. Step 3: Cross multiply
    552.08x = 826.96 × 420.68
  4. Step 4: Simplify right side
    552.08x = 347,885.53
  5. Step 5: Solve for x
    x = 347,885.53/552.08
  6. Step 6: Final answer
    x = 630.14

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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.