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Finding the Fourth Proportional to 571.58, 857.37 and 259.42

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Solution

The fourth proportional to 571.58, 857.37 and 259.42 is: 389.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.58 : 857.37 = 259.42 : x
  2. Step 2: Convert to fraction form
    571.58/857.37 = 259.42/x
  3. Step 3: Cross multiply
    571.58x = 857.37 × 259.42
  4. Step 4: Simplify right side
    571.58x = 222,418.93
  5. Step 5: Solve for x
    x = 222,418.93/571.58
  6. Step 6: Final answer
    x = 389.13

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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.