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Finding the Fourth Proportional to 287.61, 428.96 and 244.56

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Solution

The fourth proportional to 287.61, 428.96 and 244.56 is: 364.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.61 : 428.96 = 244.56 : x
  2. Step 2: Convert to fraction form
    287.61/428.96 = 244.56/x
  3. Step 3: Cross multiply
    287.61x = 428.96 × 244.56
  4. Step 4: Simplify right side
    287.61x = 104,906.46
  5. Step 5: Solve for x
    x = 104,906.46/287.61
  6. Step 6: Final answer
    x = 364.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.