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Finding the Fourth Proportional to 457.23, 685.29 and 271.87

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Solution

The fourth proportional to 457.23, 685.29 and 271.87 is: 407.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.23 : 685.29 = 271.87 : x
  2. Step 2: Convert to fraction form
    457.23/685.29 = 271.87/x
  3. Step 3: Cross multiply
    457.23x = 685.29 × 271.87
  4. Step 4: Simplify right side
    457.23x = 186,309.79
  5. Step 5: Solve for x
    x = 186,309.79/457.23
  6. Step 6: Final answer
    x = 407.47

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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.