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Finding the Fourth Proportional to 398.02, 596.21 and 393.16

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Solution

The fourth proportional to 398.02, 596.21 and 393.16 is: 588.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.02 : 596.21 = 393.16 : x
  2. Step 2: Convert to fraction form
    398.02/596.21 = 393.16/x
  3. Step 3: Cross multiply
    398.02x = 596.21 × 393.16
  4. Step 4: Simplify right side
    398.02x = 234,403.96
  5. Step 5: Solve for x
    x = 234,403.96/398.02
  6. Step 6: Final answer
    x = 588.93

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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.