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Finding the Fourth Proportional to 485.30, 726.24 and 397.58

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Solution

The fourth proportional to 485.30, 726.24 and 397.58 is: 594.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.30 : 726.24 = 397.58 : x
  2. Step 2: Convert to fraction form
    485.30/726.24 = 397.58/x
  3. Step 3: Cross multiply
    485.30x = 726.24 × 397.58
  4. Step 4: Simplify right side
    485.30x = 288,738.50
  5. Step 5: Solve for x
    x = 288,738.50/485.30
  6. Step 6: Final answer
    x = 594.97

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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.