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Finding the Fourth Proportional to 822.18, 1,233.60 and 383.64

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Solution

The fourth proportional to 822.18, 1,233.60 and 383.64 is: 575.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.18 : 1,233.60 = 383.64 : x
  2. Step 2: Convert to fraction form
    822.18/1,233.60 = 383.64/x
  3. Step 3: Cross multiply
    822.18x = 1,233.60 × 383.64
  4. Step 4: Simplify right side
    822.18x = 473,252.24
  5. Step 5: Solve for x
    x = 473,252.24/822.18
  6. Step 6: Final answer
    x = 575.60

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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.