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Finding the Fourth Proportional to 821.79, 1,233.05 and 335.16

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Solution

The fourth proportional to 821.79, 1,233.05 and 335.16 is: 502.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    821.79 : 1,233.05 = 335.16 : x
  2. Step 2: Convert to fraction form
    821.79/1,233.05 = 335.16/x
  3. Step 3: Cross multiply
    821.79x = 1,233.05 × 335.16
  4. Step 4: Simplify right side
    821.79x = 413,267.36
  5. Step 5: Solve for x
    x = 413,267.36/821.79
  6. Step 6: Final answer
    x = 502.89

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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.