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Finding the Fourth Proportional to 860.76, 1,290.88 and 244.42

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Solution

The fourth proportional to 860.76, 1,290.88 and 244.42 is: 366.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.76 : 1,290.88 = 244.42 : x
  2. Step 2: Convert to fraction form
    860.76/1,290.88 = 244.42/x
  3. Step 3: Cross multiply
    860.76x = 1,290.88 × 244.42
  4. Step 4: Simplify right side
    860.76x = 315,516.89
  5. Step 5: Solve for x
    x = 315,516.89/860.76
  6. Step 6: Final answer
    x = 366.56

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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.