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Finding the Fourth Proportional to 571.39, 851.46 and 552.79

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Solution

The fourth proportional to 571.39, 851.46 and 552.79 is: 823.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.39 : 851.46 = 552.79 : x
  2. Step 2: Convert to fraction form
    571.39/851.46 = 552.79/x
  3. Step 3: Cross multiply
    571.39x = 851.46 × 552.79
  4. Step 4: Simplify right side
    571.39x = 470,676.92
  5. Step 5: Solve for x
    x = 470,676.92/571.39
  6. Step 6: Final answer
    x = 823.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.