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Finding the Fourth Proportional to 404.87, 607.31 and 130.96

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Solution

The fourth proportional to 404.87, 607.31 and 130.96 is: 196.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.87 : 607.31 = 130.96 : x
  2. Step 2: Convert to fraction form
    404.87/607.31 = 130.96/x
  3. Step 3: Cross multiply
    404.87x = 607.31 × 130.96
  4. Step 4: Simplify right side
    404.87x = 79,531.80
  5. Step 5: Solve for x
    x = 79,531.80/404.87
  6. Step 6: Final answer
    x = 196.44

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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.