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Finding the Fourth Proportional to 393.98, 587.03 and 350.87

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Solution

The fourth proportional to 393.98, 587.03 and 350.87 is: 522.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.98 : 587.03 = 350.87 : x
  2. Step 2: Convert to fraction form
    393.98/587.03 = 350.87/x
  3. Step 3: Cross multiply
    393.98x = 587.03 × 350.87
  4. Step 4: Simplify right side
    393.98x = 205,966.53
  5. Step 5: Solve for x
    x = 205,966.53/393.98
  6. Step 6: Final answer
    x = 522.79

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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.