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Finding the Fourth Proportional to 1,330.41, 1,995.62 and 745.14

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Solution

The fourth proportional to 1,330.41, 1,995.62 and 745.14 is: 1,117.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.41 : 1,995.62 = 745.14 : x
  2. Step 2: Convert to fraction form
    1,330.41/1,995.62 = 745.14/x
  3. Step 3: Cross multiply
    1,330.41x = 1,995.62 × 745.14
  4. Step 4: Simplify right side
    1,330.41x = 1,487,013.01
  5. Step 5: Solve for x
    x = 1,487,013.01/1,330.41
  6. Step 6: Final answer
    x = 1,117.71

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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.