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Finding the Fourth Proportional to 822.22, 1,135.02 and 490.93

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Solution

The fourth proportional to 822.22, 1,135.02 and 490.93 is: 677.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.22 : 1,135.02 = 490.93 : x
  2. Step 2: Convert to fraction form
    822.22/1,135.02 = 490.93/x
  3. Step 3: Cross multiply
    822.22x = 1,135.02 × 490.93
  4. Step 4: Simplify right side
    822.22x = 557,215.37
  5. Step 5: Solve for x
    x = 557,215.37/822.22
  6. Step 6: Final answer
    x = 677.70

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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.