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Finding the Fourth Proportional to 761.34, 1,142.82 and 744.81

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Solution

The fourth proportional to 761.34, 1,142.82 and 744.81 is: 1,118.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.34 : 1,142.82 = 744.81 : x
  2. Step 2: Convert to fraction form
    761.34/1,142.82 = 744.81/x
  3. Step 3: Cross multiply
    761.34x = 1,142.82 × 744.81
  4. Step 4: Simplify right side
    761.34x = 851,183.76
  5. Step 5: Solve for x
    x = 851,183.76/761.34
  6. Step 6: Final answer
    x = 1,118.01

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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.