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Finding the Fourth Proportional to 528.92, 729.78 and 319.06

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Solution

The fourth proportional to 528.92, 729.78 and 319.06 is: 440.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.92 : 729.78 = 319.06 : x
  2. Step 2: Convert to fraction form
    528.92/729.78 = 319.06/x
  3. Step 3: Cross multiply
    528.92x = 729.78 × 319.06
  4. Step 4: Simplify right side
    528.92x = 232,843.61
  5. Step 5: Solve for x
    x = 232,843.61/528.92
  6. Step 6: Final answer
    x = 440.22

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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.