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Finding the Fourth Proportional to 571.53, 857.39 and 220.30

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Solution

The fourth proportional to 571.53, 857.39 and 220.30 is: 330.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.53 : 857.39 = 220.30 : x
  2. Step 2: Convert to fraction form
    571.53/857.39 = 220.30/x
  3. Step 3: Cross multiply
    571.53x = 857.39 × 220.30
  4. Step 4: Simplify right side
    571.53x = 188,883.02
  5. Step 5: Solve for x
    x = 188,883.02/571.53
  6. Step 6: Final answer
    x = 330.49

Related Problems

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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.