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Finding the Fourth Proportional to 464.18, 640.48 and 298.35

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Solution

The fourth proportional to 464.18, 640.48 and 298.35 is: 411.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.18 : 640.48 = 298.35 : x
  2. Step 2: Convert to fraction form
    464.18/640.48 = 298.35/x
  3. Step 3: Cross multiply
    464.18x = 640.48 × 298.35
  4. Step 4: Simplify right side
    464.18x = 191,086.46
  5. Step 5: Solve for x
    x = 191,086.46/464.18
  6. Step 6: Final answer
    x = 411.67

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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.