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Finding the Fourth Proportional to 641.08, 961.62 and 185.08

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Solution

The fourth proportional to 641.08, 961.62 and 185.08 is: 277.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.08 : 961.62 = 185.08 : x
  2. Step 2: Convert to fraction form
    641.08/961.62 = 185.08/x
  3. Step 3: Cross multiply
    641.08x = 961.62 × 185.08
  4. Step 4: Simplify right side
    641.08x = 177,976.63
  5. Step 5: Solve for x
    x = 177,976.63/641.08
  6. Step 6: Final answer
    x = 277.62

Related Problems

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Half scale
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Double scale
Find fourth proportional to 642.08, 963.12 and 186.08
Similar ratio
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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.