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Finding the Fourth Proportional to 821.34, 1,133.18 and 585.33

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Solution

The fourth proportional to 821.34, 1,133.18 and 585.33 is: 807.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    821.34 : 1,133.18 = 585.33 : x
  2. Step 2: Convert to fraction form
    821.34/1,133.18 = 585.33/x
  3. Step 3: Cross multiply
    821.34x = 1,133.18 × 585.33
  4. Step 4: Simplify right side
    821.34x = 663,278.58
  5. Step 5: Solve for x
    x = 663,278.58/821.34
  6. Step 6: Final answer
    x = 807.56

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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.