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Finding the Fourth Proportional to 628.95, 943.55 and 190.23

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Solution

The fourth proportional to 628.95, 943.55 and 190.23 is: 285.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.95 : 943.55 = 190.23 : x
  2. Step 2: Convert to fraction form
    628.95/943.55 = 190.23/x
  3. Step 3: Cross multiply
    628.95x = 943.55 × 190.23
  4. Step 4: Simplify right side
    628.95x = 179,491.99
  5. Step 5: Solve for x
    x = 179,491.99/628.95
  6. Step 6: Final answer
    x = 285.39

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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.