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Finding the Fourth Proportional to 1,453.15, 2,005.51 and 863.68

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Solution

The fourth proportional to 1,453.15, 2,005.51 and 863.68 is: 1,191.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,453.15 : 2,005.51 = 863.68 : x
  2. Step 2: Convert to fraction form
    1,453.15/2,005.51 = 863.68/x
  3. Step 3: Cross multiply
    1,453.15x = 2,005.51 × 863.68
  4. Step 4: Simplify right side
    1,453.15x = 1,732,118.88
  5. Step 5: Solve for x
    x = 1,732,118.88/1,453.15
  6. Step 6: Final answer
    x = 1,191.98

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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.