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Finding the Fourth Proportional to 456.93, 685.19 and 251.60

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Solution

The fourth proportional to 456.93, 685.19 and 251.60 is: 377.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.93 : 685.19 = 251.60 : x
  2. Step 2: Convert to fraction form
    456.93/685.19 = 251.60/x
  3. Step 3: Cross multiply
    456.93x = 685.19 × 251.60
  4. Step 4: Simplify right side
    456.93x = 172,389.12
  5. Step 5: Solve for x
    x = 172,389.12/456.93
  6. Step 6: Final answer
    x = 377.28

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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.