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Finding the Fourth Proportional to 399.37, 595.13 and 386.32

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Solution

The fourth proportional to 399.37, 595.13 and 386.32 is: 575.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.37 : 595.13 = 386.32 : x
  2. Step 2: Convert to fraction form
    399.37/595.13 = 386.32/x
  3. Step 3: Cross multiply
    399.37x = 595.13 × 386.32
  4. Step 4: Simplify right side
    399.37x = 229,910.62
  5. Step 5: Solve for x
    x = 229,910.62/399.37
  6. Step 6: Final answer
    x = 575.68

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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.