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Finding the Fourth Proportional to 821.82, 1,132.39 and 559.38

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Solution

The fourth proportional to 821.82, 1,132.39 and 559.38 is: 770.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    821.82 : 1,132.39 = 559.38 : x
  2. Step 2: Convert to fraction form
    821.82/1,132.39 = 559.38/x
  3. Step 3: Cross multiply
    821.82x = 1,132.39 × 559.38
  4. Step 4: Simplify right side
    821.82x = 633,436.32
  5. Step 5: Solve for x
    x = 633,436.32/821.82
  6. Step 6: Final answer
    x = 770.77

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Double scale
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1.5x scale

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.