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Finding the Fourth Proportional to 286.96, 395.96 and 242.55

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Solution

The fourth proportional to 286.96, 395.96 and 242.55 is: 334.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.96 : 395.96 = 242.55 : x
  2. Step 2: Convert to fraction form
    286.96/395.96 = 242.55/x
  3. Step 3: Cross multiply
    286.96x = 395.96 × 242.55
  4. Step 4: Simplify right side
    286.96x = 96,038.89
  5. Step 5: Solve for x
    x = 96,038.89/286.96
  6. Step 6: Final answer
    x = 334.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.