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Finding the Fourth Proportional to 2,628.74, 3,943.32 and 873.68

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Solution

The fourth proportional to 2,628.74, 3,943.32 and 873.68 is: 1,310.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.74 : 3,943.32 = 873.68 : x
  2. Step 2: Convert to fraction form
    2,628.74/3,943.32 = 873.68/x
  3. Step 3: Cross multiply
    2,628.74x = 3,943.32 × 873.68
  4. Step 4: Simplify right side
    2,628.74x = 3,445,199.82
  5. Step 5: Solve for x
    x = 3,445,199.82/2,628.74
  6. Step 6: Final answer
    x = 1,310.59

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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.