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Finding the Fourth Proportional to 399.52, 598.33 and 392.23

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Solution

The fourth proportional to 399.52, 598.33 and 392.23 is: 587.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.52 : 598.33 = 392.23 : x
  2. Step 2: Convert to fraction form
    399.52/598.33 = 392.23/x
  3. Step 3: Cross multiply
    399.52x = 598.33 × 392.23
  4. Step 4: Simplify right side
    399.52x = 234,682.98
  5. Step 5: Solve for x
    x = 234,682.98/399.52
  6. Step 6: Final answer
    x = 587.41

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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.