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Finding the Fourth Proportional to 310.10, 464.01 and 287.09

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Solution

The fourth proportional to 310.10, 464.01 and 287.09 is: 429.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.10 : 464.01 = 287.09 : x
  2. Step 2: Convert to fraction form
    310.10/464.01 = 287.09/x
  3. Step 3: Cross multiply
    310.10x = 464.01 × 287.09
  4. Step 4: Simplify right side
    310.10x = 133,212.63
  5. Step 5: Solve for x
    x = 133,212.63/310.10
  6. Step 6: Final answer
    x = 429.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.