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Finding the Fourth Proportional to 485.12, 726.14 and 347.49

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Solution

The fourth proportional to 485.12, 726.14 and 347.49 is: 520.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.12 : 726.14 = 347.49 : x
  2. Step 2: Convert to fraction form
    485.12/726.14 = 347.49/x
  3. Step 3: Cross multiply
    485.12x = 726.14 × 347.49
  4. Step 4: Simplify right side
    485.12x = 252,324.65
  5. Step 5: Solve for x
    x = 252,324.65/485.12
  6. Step 6: Final answer
    x = 520.13

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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.