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Finding the Fourth Proportional to 456.60, 684.12 and 251.34

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Solution

The fourth proportional to 456.60, 684.12 and 251.34 is: 376.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.60 : 684.12 = 251.34 : x
  2. Step 2: Convert to fraction form
    456.60/684.12 = 251.34/x
  3. Step 3: Cross multiply
    456.60x = 684.12 × 251.34
  4. Step 4: Simplify right side
    456.60x = 171,946.72
  5. Step 5: Solve for x
    x = 171,946.72/456.60
  6. Step 6: Final answer
    x = 376.58

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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.