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Finding the Fourth Proportional to 1,589.82, 2,385.58 and 756.68

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Solution

The fourth proportional to 1,589.82, 2,385.58 and 756.68 is: 1,135.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,589.82 : 2,385.58 = 756.68 : x
  2. Step 2: Convert to fraction form
    1,589.82/2,385.58 = 756.68/x
  3. Step 3: Cross multiply
    1,589.82x = 2,385.58 × 756.68
  4. Step 4: Simplify right side
    1,589.82x = 1,805,120.67
  5. Step 5: Solve for x
    x = 1,805,120.67/1,589.82
  6. Step 6: Final answer
    x = 1,135.42

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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.