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Finding the Fourth Proportional to 526.28, 726.18 and 319.28

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Solution

The fourth proportional to 526.28, 726.18 and 319.28 is: 440.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.28 : 726.18 = 319.28 : x
  2. Step 2: Convert to fraction form
    526.28/726.18 = 319.28/x
  3. Step 3: Cross multiply
    526.28x = 726.18 × 319.28
  4. Step 4: Simplify right side
    526.28x = 231,854.75
  5. Step 5: Solve for x
    x = 231,854.75/526.28
  6. Step 6: Final answer
    x = 440.55

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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.