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Finding the Fourth Proportional to 822.37, 1,232.19 and 577.72

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Solution

The fourth proportional to 822.37, 1,232.19 and 577.72 is: 865.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.37 : 1,232.19 = 577.72 : x
  2. Step 2: Convert to fraction form
    822.37/1,232.19 = 577.72/x
  3. Step 3: Cross multiply
    822.37x = 1,232.19 × 577.72
  4. Step 4: Simplify right side
    822.37x = 711,860.81
  5. Step 5: Solve for x
    x = 711,860.81/822.37
  6. Step 6: Final answer
    x = 865.62

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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.