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Finding the Fourth Proportional to 755.82, 1,133.01 and 688.19

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Solution

The fourth proportional to 755.82, 1,133.01 and 688.19 is: 1,031.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.82 : 1,133.01 = 688.19 : x
  2. Step 2: Convert to fraction form
    755.82/1,133.01 = 688.19/x
  3. Step 3: Cross multiply
    755.82x = 1,133.01 × 688.19
  4. Step 4: Simplify right side
    755.82x = 779,720.49
  5. Step 5: Solve for x
    x = 779,720.49/755.82
  6. Step 6: Final answer
    x = 1,031.62

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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.