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Finding the Fourth Proportional to 399.33, 594.54 and 394.47

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Solution

The fourth proportional to 399.33, 594.54 and 394.47 is: 587.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.33 : 594.54 = 394.47 : x
  2. Step 2: Convert to fraction form
    399.33/594.54 = 394.47/x
  3. Step 3: Cross multiply
    399.33x = 594.54 × 394.47
  4. Step 4: Simplify right side
    399.33x = 234,528.19
  5. Step 5: Solve for x
    x = 234,528.19/399.33
  6. Step 6: Final answer
    x = 587.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.