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Finding the Fourth Proportional to 399.32, 595.48 and 395.67

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Solution

The fourth proportional to 399.32, 595.48 and 395.67 is: 590.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.32 : 595.48 = 395.67 : x
  2. Step 2: Convert to fraction form
    399.32/595.48 = 395.67/x
  3. Step 3: Cross multiply
    399.32x = 595.48 × 395.67
  4. Step 4: Simplify right side
    399.32x = 235,612.58
  5. Step 5: Solve for x
    x = 235,612.58/399.32
  6. Step 6: Final answer
    x = 590.04

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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.