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Finding the Fourth Proportional to 804.22, 1,206.78 and 581.86

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Solution

The fourth proportional to 804.22, 1,206.78 and 581.86 is: 873.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.22 : 1,206.78 = 581.86 : x
  2. Step 2: Convert to fraction form
    804.22/1,206.78 = 581.86/x
  3. Step 3: Cross multiply
    804.22x = 1,206.78 × 581.86
  4. Step 4: Simplify right side
    804.22x = 702,177.01
  5. Step 5: Solve for x
    x = 702,177.01/804.22
  6. Step 6: Final answer
    x = 873.12

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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.