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Finding the Fourth Proportional to 571.54, 855.30 and 424.99

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Solution

The fourth proportional to 571.54, 855.30 and 424.99 is: 635.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.54 : 855.30 = 424.99 : x
  2. Step 2: Convert to fraction form
    571.54/855.30 = 424.99/x
  3. Step 3: Cross multiply
    571.54x = 855.30 × 424.99
  4. Step 4: Simplify right side
    571.54x = 363,493.95
  5. Step 5: Solve for x
    x = 363,493.95/571.54
  6. Step 6: Final answer
    x = 635.99

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Double scale
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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.