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Finding the Fourth Proportional to 401.61, 598.30 and 386.92

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Solution

The fourth proportional to 401.61, 598.30 and 386.92 is: 576.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.61 : 598.30 = 386.92 : x
  2. Step 2: Convert to fraction form
    401.61/598.30 = 386.92/x
  3. Step 3: Cross multiply
    401.61x = 598.30 × 386.92
  4. Step 4: Simplify right side
    401.61x = 231,494.24
  5. Step 5: Solve for x
    x = 231,494.24/401.61
  6. Step 6: Final answer
    x = 576.42

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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.