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Finding the Fourth Proportional to 333.90, 500.85 and 242.78

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Solution

The fourth proportional to 333.90, 500.85 and 242.78 is: 364.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.90 : 500.85 = 242.78 : x
  2. Step 2: Convert to fraction form
    333.90/500.85 = 242.78/x
  3. Step 3: Cross multiply
    333.90x = 500.85 × 242.78
  4. Step 4: Simplify right side
    333.90x = 121,593.86
  5. Step 5: Solve for x
    x = 121,593.86/333.90
  6. Step 6: Final answer
    x = 364.16

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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.