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Finding the Fourth Proportional to 464.39, 640.84 and 267.90

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Solution

The fourth proportional to 464.39, 640.84 and 267.90 is: 369.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.39 : 640.84 = 267.90 : x
  2. Step 2: Convert to fraction form
    464.39/640.84 = 267.90/x
  3. Step 3: Cross multiply
    464.39x = 640.84 × 267.90
  4. Step 4: Simplify right side
    464.39x = 171,681.04
  5. Step 5: Solve for x
    x = 171,681.04/464.39
  6. Step 6: Final answer
    x = 369.69

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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.