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Finding the Fourth Proportional to 464.66, 641.30 and 289.91

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Solution

The fourth proportional to 464.66, 641.30 and 289.91 is: 400.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.66 : 641.30 = 289.91 : x
  2. Step 2: Convert to fraction form
    464.66/641.30 = 289.91/x
  3. Step 3: Cross multiply
    464.66x = 641.30 × 289.91
  4. Step 4: Simplify right side
    464.66x = 185,919.28
  5. Step 5: Solve for x
    x = 185,919.28/464.66
  6. Step 6: Final answer
    x = 400.12

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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.