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Finding the Fourth Proportional to 464.66, 640.65 and 298.58

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Solution

The fourth proportional to 464.66, 640.65 and 298.58 is: 411.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.66 : 640.65 = 298.58 : x
  2. Step 2: Convert to fraction form
    464.66/640.65 = 298.58/x
  3. Step 3: Cross multiply
    464.66x = 640.65 × 298.58
  4. Step 4: Simplify right side
    464.66x = 191,285.28
  5. Step 5: Solve for x
    x = 191,285.28/464.66
  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.