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Finding the Fourth Proportional to 1,263.15, 1,743.84 and 872.28

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Solution

The fourth proportional to 1,263.15, 1,743.84 and 872.28 is: 1,204.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.15 : 1,743.84 = 872.28 : x
  2. Step 2: Convert to fraction form
    1,263.15/1,743.84 = 872.28/x
  3. Step 3: Cross multiply
    1,263.15x = 1,743.84 × 872.28
  4. Step 4: Simplify right side
    1,263.15x = 1,521,116.76
  5. Step 5: Solve for x
    x = 1,521,116.76/1,263.15
  6. Step 6: Final answer
    x = 1,204.22

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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.