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Finding the Fourth Proportional to 641.14, 961.47 and 230.17

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Solution

The fourth proportional to 641.14, 961.47 and 230.17 is: 345.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.14 : 961.47 = 230.17 : x
  2. Step 2: Convert to fraction form
    641.14/961.47 = 230.17/x
  3. Step 3: Cross multiply
    641.14x = 961.47 × 230.17
  4. Step 4: Simplify right side
    641.14x = 221,301.55
  5. Step 5: Solve for x
    x = 221,301.55/641.14
  6. Step 6: Final answer
    x = 345.17

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1.5x scale

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.