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Finding the Fourth Proportional to 661.98, 993.96 and 575.85

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Solution

The fourth proportional to 661.98, 993.96 and 575.85 is: 864.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.98 : 993.96 = 575.85 : x
  2. Step 2: Convert to fraction form
    661.98/993.96 = 575.85/x
  3. Step 3: Cross multiply
    661.98x = 993.96 × 575.85
  4. Step 4: Simplify right side
    661.98x = 572,371.87
  5. Step 5: Solve for x
    x = 572,371.87/661.98
  6. Step 6: Final answer
    x = 864.64

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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.