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Finding the Fourth Proportional to 2,162.72, 3,244.40 and 775.76

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Solution

The fourth proportional to 2,162.72, 3,244.40 and 775.76 is: 1,163.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,162.72 : 3,244.40 = 775.76 : x
  2. Step 2: Convert to fraction form
    2,162.72/3,244.40 = 775.76/x
  3. Step 3: Cross multiply
    2,162.72x = 3,244.40 × 775.76
  4. Step 4: Simplify right side
    2,162.72x = 2,516,875.74
  5. Step 5: Solve for x
    x = 2,516,875.74/2,162.72
  6. Step 6: Final answer
    x = 1,163.75

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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.