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Finding the Fourth Proportional to 472.57, 707.79 and 252.80

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Solution

The fourth proportional to 472.57, 707.79 and 252.80 is: 378.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.57 : 707.79 = 252.80 : x
  2. Step 2: Convert to fraction form
    472.57/707.79 = 252.80/x
  3. Step 3: Cross multiply
    472.57x = 707.79 × 252.80
  4. Step 4: Simplify right side
    472.57x = 178,931.08
  5. Step 5: Solve for x
    x = 178,931.08/472.57
  6. Step 6: Final answer
    x = 378.64

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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.