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Finding the Fourth Proportional to 1,281.82, 1,769.03 and 757.75

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Solution

The fourth proportional to 1,281.82, 1,769.03 and 757.75 is: 1,045.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.82 : 1,769.03 = 757.75 : x
  2. Step 2: Convert to fraction form
    1,281.82/1,769.03 = 757.75/x
  3. Step 3: Cross multiply
    1,281.82x = 1,769.03 × 757.75
  4. Step 4: Simplify right side
    1,281.82x = 1,340,482.48
  5. Step 5: Solve for x
    x = 1,340,482.48/1,281.82
  6. Step 6: Final answer
    x = 1,045.76

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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.