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Finding the Fourth Proportional to 401.31, 555.12 and 335.70

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Solution

The fourth proportional to 401.31, 555.12 and 335.70 is: 464.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.31 : 555.12 = 335.70 : x
  2. Step 2: Convert to fraction form
    401.31/555.12 = 335.70/x
  3. Step 3: Cross multiply
    401.31x = 555.12 × 335.70
  4. Step 4: Simplify right side
    401.31x = 186,353.78
  5. Step 5: Solve for x
    x = 186,353.78/401.31
  6. Step 6: Final answer
    x = 464.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.