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Finding the Fourth Proportional to 628.91, 943.20 and 190.10

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Solution

The fourth proportional to 628.91, 943.20 and 190.10 is: 285.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.91 : 943.20 = 190.10 : x
  2. Step 2: Convert to fraction form
    628.91/943.20 = 190.10/x
  3. Step 3: Cross multiply
    628.91x = 943.20 × 190.10
  4. Step 4: Simplify right side
    628.91x = 179,297.60
  5. Step 5: Solve for x
    x = 179,297.60/628.91
  6. Step 6: Final answer
    x = 285.09

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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.