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Finding the Fourth Proportional to 910.72, 1,365.96 and 252.64

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Solution

The fourth proportional to 910.72, 1,365.96 and 252.64 is: 378.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.72 : 1,365.96 = 252.64 : x
  2. Step 2: Convert to fraction form
    910.72/1,365.96 = 252.64/x
  3. Step 3: Cross multiply
    910.72x = 1,365.96 × 252.64
  4. Step 4: Simplify right side
    910.72x = 345,102.63
  5. Step 5: Solve for x
    x = 345,102.63/910.72
  6. Step 6: Final answer
    x = 378.93

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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.