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Finding the Fourth Proportional to 718.82, 993.27 and 561.86

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Solution

The fourth proportional to 718.82, 993.27 and 561.86 is: 776.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.82 : 993.27 = 561.86 : x
  2. Step 2: Convert to fraction form
    718.82/993.27 = 561.86/x
  3. Step 3: Cross multiply
    718.82x = 993.27 × 561.86
  4. Step 4: Simplify right side
    718.82x = 558,078.68
  5. Step 5: Solve for x
    x = 558,078.68/718.82
  6. Step 6: Final answer
    x = 776.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.