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Finding the Fourth Proportional to 768.62, 1,153.03 and 248.49

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Solution

The fourth proportional to 768.62, 1,153.03 and 248.49 is: 372.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.62 : 1,153.03 = 248.49 : x
  2. Step 2: Convert to fraction form
    768.62/1,153.03 = 248.49/x
  3. Step 3: Cross multiply
    768.62x = 1,153.03 × 248.49
  4. Step 4: Simplify right side
    768.62x = 286,516.42
  5. Step 5: Solve for x
    x = 286,516.42/768.62
  6. Step 6: Final answer
    x = 372.77

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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.