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Finding the Fourth Proportional to 464.07, 640.30 and 289.29

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Solution

The fourth proportional to 464.07, 640.30 and 289.29 is: 399.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.07 : 640.30 = 289.29 : x
  2. Step 2: Convert to fraction form
    464.07/640.30 = 289.29/x
  3. Step 3: Cross multiply
    464.07x = 640.30 × 289.29
  4. Step 4: Simplify right side
    464.07x = 185,232.39
  5. Step 5: Solve for x
    x = 185,232.39/464.07
  6. Step 6: Final answer
    x = 399.15

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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.