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Finding the Fourth Proportional to 485.18, 726.33 and 320.34

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Solution

The fourth proportional to 485.18, 726.33 and 320.34 is: 479.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.18 : 726.33 = 320.34 : x
  2. Step 2: Convert to fraction form
    485.18/726.33 = 320.34/x
  3. Step 3: Cross multiply
    485.18x = 726.33 × 320.34
  4. Step 4: Simplify right side
    485.18x = 232,672.55
  5. Step 5: Solve for x
    x = 232,672.55/485.18
  6. Step 6: Final answer
    x = 479.56

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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.