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Finding the Fourth Proportional to 528.19, 792.28 and 143.44

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Solution

The fourth proportional to 528.19, 792.28 and 143.44 is: 215.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.19 : 792.28 = 143.44 : x
  2. Step 2: Convert to fraction form
    528.19/792.28 = 143.44/x
  3. Step 3: Cross multiply
    528.19x = 792.28 × 143.44
  4. Step 4: Simplify right side
    528.19x = 113,642.84
  5. Step 5: Solve for x
    x = 113,642.84/528.19
  6. Step 6: Final answer
    x = 215.16

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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.