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Finding the Fourth Proportional to 1,282.49, 1,769.84 and 693.03

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Solution

The fourth proportional to 1,282.49, 1,769.84 and 693.03 is: 956.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.49 : 1,769.84 = 693.03 : x
  2. Step 2: Convert to fraction form
    1,282.49/1,769.84 = 693.03/x
  3. Step 3: Cross multiply
    1,282.49x = 1,769.84 × 693.03
  4. Step 4: Simplify right side
    1,282.49x = 1,226,539.90
  5. Step 5: Solve for x
    x = 1,226,539.90/1,282.49
  6. Step 6: Final answer
    x = 956.37

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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.