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Finding the Fourth Proportional to 528.40, 792.51 and 163.11

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Solution

The fourth proportional to 528.40, 792.51 and 163.11 is: 244.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.40 : 792.51 = 163.11 : x
  2. Step 2: Convert to fraction form
    528.40/792.51 = 163.11/x
  3. Step 3: Cross multiply
    528.40x = 792.51 × 163.11
  4. Step 4: Simplify right side
    528.40x = 129,269.13
  5. Step 5: Solve for x
    x = 129,269.13/528.40
  6. Step 6: Final answer
    x = 244.64

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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.