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Finding the Fourth Proportional to 1,692.36, 2,538.59 and 814.73

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Solution

The fourth proportional to 1,692.36, 2,538.59 and 814.73 is: 1,222.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,692.36 : 2,538.59 = 814.73 : x
  2. Step 2: Convert to fraction form
    1,692.36/2,538.59 = 814.73/x
  3. Step 3: Cross multiply
    1,692.36x = 2,538.59 × 814.73
  4. Step 4: Simplify right side
    1,692.36x = 2,068,248.66
  5. Step 5: Solve for x
    x = 2,068,248.66/1,692.36
  6. Step 6: Final answer
    x = 1,222.11

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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.