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Finding the Fourth Proportional to 628.99, 943.49 and 218.13

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Solution

The fourth proportional to 628.99, 943.49 and 218.13 is: 327.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.99 : 943.49 = 218.13 : x
  2. Step 2: Convert to fraction form
    628.99/943.49 = 218.13/x
  3. Step 3: Cross multiply
    628.99x = 943.49 × 218.13
  4. Step 4: Simplify right side
    628.99x = 205,801.02
  5. Step 5: Solve for x
    x = 205,801.02/628.99
  6. Step 6: Final answer
    x = 327.19

Related Problems

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Half scale
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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.