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Finding the Fourth Proportional to 2,697.60, 3,721.22 and 1,856.82

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Solution

The fourth proportional to 2,697.60, 3,721.22 and 1,856.82 is: 2,561.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,697.60 : 3,721.22 = 1,856.82 : x
  2. Step 2: Convert to fraction form
    2,697.60/3,721.22 = 1,856.82/x
  3. Step 3: Cross multiply
    2,697.60x = 3,721.22 × 1,856.82
  4. Step 4: Simplify right side
    2,697.60x = 6,909,635.72
  5. Step 5: Solve for x
    x = 6,909,635.72/2,697.60
  6. Step 6: Final answer
    x = 2,561.40

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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.