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Finding the Fourth Proportional to 397.44, 595.32 and 319.92

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Solution

The fourth proportional to 397.44, 595.32 and 319.92 is: 479.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.44 : 595.32 = 319.92 : x
  2. Step 2: Convert to fraction form
    397.44/595.32 = 319.92/x
  3. Step 3: Cross multiply
    397.44x = 595.32 × 319.92
  4. Step 4: Simplify right side
    397.44x = 190,454.77
  5. Step 5: Solve for x
    x = 190,454.77/397.44
  6. Step 6: Final answer
    x = 479.20

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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.