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Finding the Fourth Proportional to 457.08, 685.57 and 225.99

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Solution

The fourth proportional to 457.08, 685.57 and 225.99 is: 338.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.08 : 685.57 = 225.99 : x
  2. Step 2: Convert to fraction form
    457.08/685.57 = 225.99/x
  3. Step 3: Cross multiply
    457.08x = 685.57 × 225.99
  4. Step 4: Simplify right side
    457.08x = 154,931.96
  5. Step 5: Solve for x
    x = 154,931.96/457.08
  6. Step 6: Final answer
    x = 338.96

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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.