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Finding the Fourth Proportional to 1,330.81, 1,995.32 and 745.86

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Solution

The fourth proportional to 1,330.81, 1,995.32 and 745.86 is: 1,118.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.81 : 1,995.32 = 745.86 : x
  2. Step 2: Convert to fraction form
    1,330.81/1,995.32 = 745.86/x
  3. Step 3: Cross multiply
    1,330.81x = 1,995.32 × 745.86
  4. Step 4: Simplify right side
    1,330.81x = 1,488,231.24
  5. Step 5: Solve for x
    x = 1,488,231.24/1,330.81
  6. Step 6: Final answer
    x = 1,118.29

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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.