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Finding the Fourth Proportional to 766.02, 1,143.23 and 692.21

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Solution

The fourth proportional to 766.02, 1,143.23 and 692.21 is: 1,033.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.02 : 1,143.23 = 692.21 : x
  2. Step 2: Convert to fraction form
    766.02/1,143.23 = 692.21/x
  3. Step 3: Cross multiply
    766.02x = 1,143.23 × 692.21
  4. Step 4: Simplify right side
    766.02x = 791,359.83
  5. Step 5: Solve for x
    x = 791,359.83/766.02
  6. Step 6: Final answer
    x = 1,033.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.