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Finding the Fourth Proportional to 1,083.15, 1,495.77 and 863.72

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Solution

The fourth proportional to 1,083.15, 1,495.77 and 863.72 is: 1,192.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.15 : 1,495.77 = 863.72 : x
  2. Step 2: Convert to fraction form
    1,083.15/1,495.77 = 863.72/x
  3. Step 3: Cross multiply
    1,083.15x = 1,495.77 × 863.72
  4. Step 4: Simplify right side
    1,083.15x = 1,291,918.99
  5. Step 5: Solve for x
    x = 1,291,918.99/1,083.15
  6. Step 6: Final answer
    x = 1,192.74

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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.