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Finding the Fourth Proportional to 641.44, 961.58 and 230.51

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Solution

The fourth proportional to 641.44, 961.58 and 230.51 is: 345.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.44 : 961.58 = 230.51 : x
  2. Step 2: Convert to fraction form
    641.44/961.58 = 230.51/x
  3. Step 3: Cross multiply
    641.44x = 961.58 × 230.51
  4. Step 4: Simplify right side
    641.44x = 221,653.81
  5. Step 5: Solve for x
    x = 221,653.81/641.44
  6. Step 6: Final answer
    x = 345.56

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Double scale
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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.