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Finding the Fourth Proportional to 3,108.51, 4,661.73 and 917.28

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Solution

The fourth proportional to 3,108.51, 4,661.73 and 917.28 is: 1,375.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.51 : 4,661.73 = 917.28 : x
  2. Step 2: Convert to fraction form
    3,108.51/4,661.73 = 917.28/x
  3. Step 3: Cross multiply
    3,108.51x = 4,661.73 × 917.28
  4. Step 4: Simplify right side
    3,108.51x = 4,276,111.69
  5. Step 5: Solve for x
    x = 4,276,111.69/3,108.51
  6. Step 6: Final answer
    x = 1,375.61

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1.5x scale

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.