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Finding the Fourth Proportional to 822.20, 1,134.60 and 468.10

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Solution

The fourth proportional to 822.20, 1,134.60 and 468.10 is: 645.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.20 : 1,134.60 = 468.10 : x
  2. Step 2: Convert to fraction form
    822.20/1,134.60 = 468.10/x
  3. Step 3: Cross multiply
    822.20x = 1,134.60 × 468.10
  4. Step 4: Simplify right side
    822.20x = 531,106.26
  5. Step 5: Solve for x
    x = 531,106.26/822.20
  6. Step 6: Final answer
    x = 645.96

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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.