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Finding the Fourth Proportional to 1,692.50, 2,538 and 768.02

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Solution

The fourth proportional to 1,692.50, 2,538 and 768.02 is: 1,151.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,692.50 : 2,538 = 768.02 : x
  2. Step 2: Convert to fraction form
    1,692.50/2,538 = 768.02/x
  3. Step 3: Cross multiply
    1,692.50x = 2,538 × 768.02
  4. Step 4: Simplify right side
    1,692.50x = 1,949,222.07
  5. Step 5: Solve for x
    x = 1,949,222.07/1,692.50
  6. Step 6: Final answer
    x = 1,151.69

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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.