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Finding the Fourth Proportional to 474.36, 711.19 and 319.85

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Solution

The fourth proportional to 474.36, 711.19 and 319.85 is: 479.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.36 : 711.19 = 319.85 : x
  2. Step 2: Convert to fraction form
    474.36/711.19 = 319.85/x
  3. Step 3: Cross multiply
    474.36x = 711.19 × 319.85
  4. Step 4: Simplify right side
    474.36x = 227,474.12
  5. Step 5: Solve for x
    x = 227,474.12/474.36
  6. Step 6: Final answer
    x = 479.54

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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.