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Finding the Fourth Proportional to 662.69, 991.39 and 572.37

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Solution

The fourth proportional to 662.69, 991.39 and 572.37 is: 856.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.69 : 991.39 = 572.37 : x
  2. Step 2: Convert to fraction form
    662.69/991.39 = 572.37/x
  3. Step 3: Cross multiply
    662.69x = 991.39 × 572.37
  4. Step 4: Simplify right side
    662.69x = 567,441.89
  5. Step 5: Solve for x
    x = 567,441.89/662.69
  6. Step 6: Final answer
    x = 856.27

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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.