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Finding the Fourth Proportional to 869.87, 1,304.81 and 292.74

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Solution

The fourth proportional to 869.87, 1,304.81 and 292.74 is: 439.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.87 : 1,304.81 = 292.74 : x
  2. Step 2: Convert to fraction form
    869.87/1,304.81 = 292.74/x
  3. Step 3: Cross multiply
    869.87x = 1,304.81 × 292.74
  4. Step 4: Simplify right side
    869.87x = 381,968.62
  5. Step 5: Solve for x
    x = 381,968.62/869.87
  6. Step 6: Final answer
    x = 439.11

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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.