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Finding the Fourth Proportional to 910.52, 1,365.81 and 252.45

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Solution

The fourth proportional to 910.52, 1,365.81 and 252.45 is: 378.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.52 : 1,365.81 = 252.45 : x
  2. Step 2: Convert to fraction form
    910.52/1,365.81 = 252.45/x
  3. Step 3: Cross multiply
    910.52x = 1,365.81 × 252.45
  4. Step 4: Simplify right side
    910.52x = 344,798.73
  5. Step 5: Solve for x
    x = 344,798.73/910.52
  6. Step 6: Final answer
    x = 378.68

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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.