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Finding the Fourth Proportional to 401.13, 600.75 and 393.57

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Solution

The fourth proportional to 401.13, 600.75 and 393.57 is: 589.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.13 : 600.75 = 393.57 : x
  2. Step 2: Convert to fraction form
    401.13/600.75 = 393.57/x
  3. Step 3: Cross multiply
    401.13x = 600.75 × 393.57
  4. Step 4: Simplify right side
    401.13x = 236,437.18
  5. Step 5: Solve for x
    x = 236,437.18/401.13
  6. Step 6: Final answer
    x = 589.43

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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.