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Finding the Fourth Proportional to 398.62, 599.15 and 290.89

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Solution

The fourth proportional to 398.62, 599.15 and 290.89 is: 437.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.62 : 599.15 = 290.89 : x
  2. Step 2: Convert to fraction form
    398.62/599.15 = 290.89/x
  3. Step 3: Cross multiply
    398.62x = 599.15 × 290.89
  4. Step 4: Simplify right side
    398.62x = 174,286.74
  5. Step 5: Solve for x
    x = 174,286.74/398.62
  6. Step 6: Final answer
    x = 437.23

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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.