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Finding the Fourth Proportional to 571.89, 789.21 and 335.78

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Solution

The fourth proportional to 571.89, 789.21 and 335.78 is: 463.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.89 : 789.21 = 335.78 : x
  2. Step 2: Convert to fraction form
    571.89/789.21 = 335.78/x
  3. Step 3: Cross multiply
    571.89x = 789.21 × 335.78
  4. Step 4: Simplify right side
    571.89x = 265,000.93
  5. Step 5: Solve for x
    x = 265,000.93/571.89
  6. Step 6: Final answer
    x = 463.38

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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.