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Finding the Fourth Proportional to 1,276.22, 1,913.96 and 535.81

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Solution

The fourth proportional to 1,276.22, 1,913.96 and 535.81 is: 803.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.22 : 1,913.96 = 535.81 : x
  2. Step 2: Convert to fraction form
    1,276.22/1,913.96 = 535.81/x
  3. Step 3: Cross multiply
    1,276.22x = 1,913.96 × 535.81
  4. Step 4: Simplify right side
    1,276.22x = 1,025,519.05
  5. Step 5: Solve for x
    x = 1,025,519.05/1,276.22
  6. Step 6: Final answer
    x = 803.56

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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.