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Finding the Fourth Proportional to 456.66, 685.76 and 281.99

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Solution

The fourth proportional to 456.66, 685.76 and 281.99 is: 423.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.66 : 685.76 = 281.99 : x
  2. Step 2: Convert to fraction form
    456.66/685.76 = 281.99/x
  3. Step 3: Cross multiply
    456.66x = 685.76 × 281.99
  4. Step 4: Simplify right side
    456.66x = 193,372.62
  5. Step 5: Solve for x
    x = 193,372.62/456.66
  6. Step 6: Final answer
    x = 423.45

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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.