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Finding the Fourth Proportional to 464.05, 640.31 and 298.24

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Solution

The fourth proportional to 464.05, 640.31 and 298.24 is: 411.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.05 : 640.31 = 298.24 : x
  2. Step 2: Convert to fraction form
    464.05/640.31 = 298.24/x
  3. Step 3: Cross multiply
    464.05x = 640.31 × 298.24
  4. Step 4: Simplify right side
    464.05x = 190,967.46
  5. Step 5: Solve for x
    x = 190,967.46/464.05
  6. Step 6: Final answer
    x = 411.52

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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.