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Finding the Fourth Proportional to 528.28, 728.62 and 351.32

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Solution

The fourth proportional to 528.28, 728.62 and 351.32 is: 484.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.28 : 728.62 = 351.32 : x
  2. Step 2: Convert to fraction form
    528.28/728.62 = 351.32/x
  3. Step 3: Cross multiply
    528.28x = 728.62 × 351.32
  4. Step 4: Simplify right side
    528.28x = 255,978.78
  5. Step 5: Solve for x
    x = 255,978.78/528.28
  6. Step 6: Final answer
    x = 484.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.