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Finding the Fourth Proportional to 464.67, 641.16 and 289.98

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Solution

The fourth proportional to 464.67, 641.16 and 289.98 is: 400.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.67 : 641.16 = 289.98 : x
  2. Step 2: Convert to fraction form
    464.67/641.16 = 289.98/x
  3. Step 3: Cross multiply
    464.67x = 641.16 × 289.98
  4. Step 4: Simplify right side
    464.67x = 185,923.58
  5. Step 5: Solve for x
    x = 185,923.58/464.67
  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.