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Finding the Fourth Proportional to 1,276.86, 1,914.57 and 535.62

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Solution

The fourth proportional to 1,276.86, 1,914.57 and 535.62 is: 803.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.86 : 1,914.57 = 535.62 : x
  2. Step 2: Convert to fraction form
    1,276.86/1,914.57 = 535.62/x
  3. Step 3: Cross multiply
    1,276.86x = 1,914.57 × 535.62
  4. Step 4: Simplify right side
    1,276.86x = 1,025,481.98
  5. Step 5: Solve for x
    x = 1,025,481.98/1,276.86
  6. Step 6: Final answer
    x = 803.13

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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.