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Finding the Fourth Proportional to 464.16, 639.14 and 401.88

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Solution

The fourth proportional to 464.16, 639.14 and 401.88 is: 553.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.16 : 639.14 = 401.88 : x
  2. Step 2: Convert to fraction form
    464.16/639.14 = 401.88/x
  3. Step 3: Cross multiply
    464.16x = 639.14 × 401.88
  4. Step 4: Simplify right side
    464.16x = 256,857.58
  5. Step 5: Solve for x
    x = 256,857.58/464.16
  6. Step 6: Final answer
    x = 553.38

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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.