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Finding the Fourth Proportional to 464.60, 640.72 and 298.52

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Solution

The fourth proportional to 464.60, 640.72 and 298.52 is: 411.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.60 : 640.72 = 298.52 : x
  2. Step 2: Convert to fraction form
    464.60/640.72 = 298.52/x
  3. Step 3: Cross multiply
    464.60x = 640.72 × 298.52
  4. Step 4: Simplify right side
    464.60x = 191,267.73
  5. Step 5: Solve for x
    x = 191,267.73/464.60
  6. Step 6: Final answer
    x = 411.68

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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.