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Finding the Fourth Proportional to 401.13, 601.32 and 144.57

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Solution

The fourth proportional to 401.13, 601.32 and 144.57 is: 216.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.13 : 601.32 = 144.57 : x
  2. Step 2: Convert to fraction form
    401.13/601.32 = 144.57/x
  3. Step 3: Cross multiply
    401.13x = 601.32 × 144.57
  4. Step 4: Simplify right side
    401.13x = 86,932.83
  5. Step 5: Solve for x
    x = 86,932.83/401.13
  6. Step 6: Final answer
    x = 216.72

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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.