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Finding the Fourth Proportional to 641.13, 961.13 and 230.18

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Solution

The fourth proportional to 641.13, 961.13 and 230.18 is: 345.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.13 : 961.13 = 230.18 : x
  2. Step 2: Convert to fraction form
    641.13/961.13 = 230.18/x
  3. Step 3: Cross multiply
    641.13x = 961.13 × 230.18
  4. Step 4: Simplify right side
    641.13x = 221,226.95
  5. Step 5: Solve for x
    x = 221,226.95/641.13
  6. Step 6: Final answer
    x = 345.06

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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.