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Finding the Fourth Proportional to 401.25, 602.10 and 398.19

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Solution

The fourth proportional to 401.25, 602.10 and 398.19 is: 597.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.25 : 602.10 = 398.19 : x
  2. Step 2: Convert to fraction form
    401.25/602.10 = 398.19/x
  3. Step 3: Cross multiply
    401.25x = 602.10 × 398.19
  4. Step 4: Simplify right side
    401.25x = 239,750.20
  5. Step 5: Solve for x
    x = 239,750.20/401.25
  6. Step 6: Final answer
    x = 597.51

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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.