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Finding the Fourth Proportional to 464.27, 640.70 and 298.80

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Solution

The fourth proportional to 464.27, 640.70 and 298.80 is: 412.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.27 : 640.70 = 298.80 : x
  2. Step 2: Convert to fraction form
    464.27/640.70 = 298.80/x
  3. Step 3: Cross multiply
    464.27x = 640.70 × 298.80
  4. Step 4: Simplify right side
    464.27x = 191,440.79
  5. Step 5: Solve for x
    x = 191,440.79/464.27
  6. Step 6: Final answer
    x = 412.35

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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.