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Finding the Fourth Proportional to 473.72, 711.25 and 242.78

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Solution

The fourth proportional to 473.72, 711.25 and 242.78 is: 364.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.72 : 711.25 = 242.78 : x
  2. Step 2: Convert to fraction form
    473.72/711.25 = 242.78/x
  3. Step 3: Cross multiply
    473.72x = 711.25 × 242.78
  4. Step 4: Simplify right side
    473.72x = 172,677.36
  5. Step 5: Solve for x
    x = 172,677.36/473.72
  6. Step 6: Final answer
    x = 364.51

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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.