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Finding the Fourth Proportional to 822.37, 1,134.91 and 468.40

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Solution

The fourth proportional to 822.37, 1,134.91 and 468.40 is: 646.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.37 : 1,134.91 = 468.40 : x
  2. Step 2: Convert to fraction form
    822.37/1,134.91 = 468.40/x
  3. Step 3: Cross multiply
    822.37x = 1,134.91 × 468.40
  4. Step 4: Simplify right side
    822.37x = 531,593.14
  5. Step 5: Solve for x
    x = 531,593.14/822.37
  6. Step 6: Final answer
    x = 646.42

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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.