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Finding the Fourth Proportional to 2,641.76, 3,644.16 and 2,080.16

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Solution

The fourth proportional to 2,641.76, 3,644.16 and 2,080.16 is: 2,869.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,641.76 : 3,644.16 = 2,080.16 : x
  2. Step 2: Convert to fraction form
    2,641.76/3,644.16 = 2,080.16/x
  3. Step 3: Cross multiply
    2,641.76x = 3,644.16 × 2,080.16
  4. Step 4: Simplify right side
    2,641.76x = 7,580,435.87
  5. Step 5: Solve for x
    x = 7,580,435.87/2,641.76
  6. Step 6: Final answer
    x = 2,869.46

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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.