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Finding the Fourth Proportional to 661.86, 993.87 and 565.74

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Solution

The fourth proportional to 661.86, 993.87 and 565.74 is: 849.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.86 : 993.87 = 565.74 : x
  2. Step 2: Convert to fraction form
    661.86/993.87 = 565.74/x
  3. Step 3: Cross multiply
    661.86x = 993.87 × 565.74
  4. Step 4: Simplify right side
    661.86x = 562,272.01
  5. Step 5: Solve for x
    x = 562,272.01/661.86
  6. Step 6: Final answer
    x = 849.53

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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.