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Finding the Fourth Proportional to 640.31, 961.07 and 589.28

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Solution

The fourth proportional to 640.31, 961.07 and 589.28 is: 884.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.31 : 961.07 = 589.28 : x
  2. Step 2: Convert to fraction form
    640.31/961.07 = 589.28/x
  3. Step 3: Cross multiply
    640.31x = 961.07 × 589.28
  4. Step 4: Simplify right side
    640.31x = 566,331.58
  5. Step 5: Solve for x
    x = 566,331.58/640.31
  6. Step 6: Final answer
    x = 884.47

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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.