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Finding the Fourth Proportional to 526.28, 726.43 and 329.79

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Solution

The fourth proportional to 526.28, 726.43 and 329.79 is: 455.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.28 : 726.43 = 329.79 : x
  2. Step 2: Convert to fraction form
    526.28/726.43 = 329.79/x
  3. Step 3: Cross multiply
    526.28x = 726.43 × 329.79
  4. Step 4: Simplify right side
    526.28x = 239,568.53
  5. Step 5: Solve for x
    x = 239,568.53/526.28
  6. Step 6: Final answer
    x = 455.21

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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.