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Finding the Fourth Proportional to 1,276.02, 1,913.17 and 863.93

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Solution

The fourth proportional to 1,276.02, 1,913.17 and 863.93 is: 1,295.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.02 : 1,913.17 = 863.93 : x
  2. Step 2: Convert to fraction form
    1,276.02/1,913.17 = 863.93/x
  3. Step 3: Cross multiply
    1,276.02x = 1,913.17 × 863.93
  4. Step 4: Simplify right side
    1,276.02x = 1,652,844.96
  5. Step 5: Solve for x
    x = 1,652,844.96/1,276.02
  6. Step 6: Final answer
    x = 1,295.31

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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.