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Finding the Fourth Proportional to 628.74, 943.05 and 189.97

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Solution

The fourth proportional to 628.74, 943.05 and 189.97 is: 284.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.74 : 943.05 = 189.97 : x
  2. Step 2: Convert to fraction form
    628.74/943.05 = 189.97/x
  3. Step 3: Cross multiply
    628.74x = 943.05 × 189.97
  4. Step 4: Simplify right side
    628.74x = 179,151.21
  5. Step 5: Solve for x
    x = 179,151.21/628.74
  6. Step 6: Final answer
    x = 284.94

Related Problems

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Double scale
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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.