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Finding the Fourth Proportional to 474.43, 711.45 and 279.82

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Solution

The fourth proportional to 474.43, 711.45 and 279.82 is: 419.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.43 : 711.45 = 279.82 : x
  2. Step 2: Convert to fraction form
    474.43/711.45 = 279.82/x
  3. Step 3: Cross multiply
    474.43x = 711.45 × 279.82
  4. Step 4: Simplify right side
    474.43x = 199,077.94
  5. Step 5: Solve for x
    x = 199,077.94/474.43
  6. Step 6: Final answer
    x = 419.61

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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.