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Finding the Fourth Proportional to 3,009.76, 4,161.54 and 2,640.76

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Solution

The fourth proportional to 3,009.76, 4,161.54 and 2,640.76 is: 3,651.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,009.76 : 4,161.54 = 2,640.76 : x
  2. Step 2: Convert to fraction form
    3,009.76/4,161.54 = 2,640.76/x
  3. Step 3: Cross multiply
    3,009.76x = 4,161.54 × 2,640.76
  4. Step 4: Simplify right side
    3,009.76x = 10,989,628.37
  5. Step 5: Solve for x
    x = 10,989,628.37/3,009.76
  6. Step 6: Final answer
    x = 3,651.33

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Half scale
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Double scale
Find fourth proportional to 3,010.76, 4,162.92 and 2,641.76
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1.5x scale

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.