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Finding the Fourth Proportional to 292.96, 439.46 and 76.53

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Solution

The fourth proportional to 292.96, 439.46 and 76.53 is: 114.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.96 : 439.46 = 76.53 : x
  2. Step 2: Convert to fraction form
    292.96/439.46 = 76.53/x
  3. Step 3: Cross multiply
    292.96x = 439.46 × 76.53
  4. Step 4: Simplify right side
    292.96x = 33,631.49
  5. Step 5: Solve for x
    x = 33,631.49/292.96
  6. Step 6: Final answer
    x = 114.80

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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.