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Finding the Fourth Proportional to 457.27, 685.84 and 210.49

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Solution

The fourth proportional to 457.27, 685.84 and 210.49 is: 315.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.27 : 685.84 = 210.49 : x
  2. Step 2: Convert to fraction form
    457.27/685.84 = 210.49/x
  3. Step 3: Cross multiply
    457.27x = 685.84 × 210.49
  4. Step 4: Simplify right side
    457.27x = 144,359.03
  5. Step 5: Solve for x
    x = 144,359.03/457.27
  6. Step 6: Final answer
    x = 315.70

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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.