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Finding the Fourth Proportional to 1,305.15, 1,801.26 and 745.71

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Solution

The fourth proportional to 1,305.15, 1,801.26 and 745.71 is: 1,029.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.15 : 1,801.26 = 745.71 : x
  2. Step 2: Convert to fraction form
    1,305.15/1,801.26 = 745.71/x
  3. Step 3: Cross multiply
    1,305.15x = 1,801.26 × 745.71
  4. Step 4: Simplify right side
    1,305.15x = 1,343,217.59
  5. Step 5: Solve for x
    x = 1,343,217.59/1,305.15
  6. Step 6: Final answer
    x = 1,029.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.