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Finding the Fourth Proportional to 745.17, 1,117.06 and 251.23

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Solution

The fourth proportional to 745.17, 1,117.06 and 251.23 is: 376.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.17 : 1,117.06 = 251.23 : x
  2. Step 2: Convert to fraction form
    745.17/1,117.06 = 251.23/x
  3. Step 3: Cross multiply
    745.17x = 1,117.06 × 251.23
  4. Step 4: Simplify right side
    745.17x = 280,637.73
  5. Step 5: Solve for x
    x = 280,637.73/745.17
  6. Step 6: Final answer
    x = 376.61

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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.