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Finding the Fourth Proportional to 671.69, 927.33 and 439.22

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Solution

The fourth proportional to 671.69, 927.33 and 439.22 is: 606.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.69 : 927.33 = 439.22 : x
  2. Step 2: Convert to fraction form
    671.69/927.33 = 439.22/x
  3. Step 3: Cross multiply
    671.69x = 927.33 × 439.22
  4. Step 4: Simplify right side
    671.69x = 407,301.88
  5. Step 5: Solve for x
    x = 407,301.88/671.69
  6. Step 6: Final answer
    x = 606.38

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.