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Finding the Fourth Proportional to 1,145.92, 1,716.60 and 854.32

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Solution

The fourth proportional to 1,145.92, 1,716.60 and 854.32 is: 1,279.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.92 : 1,716.60 = 854.32 : x
  2. Step 2: Convert to fraction form
    1,145.92/1,716.60 = 854.32/x
  3. Step 3: Cross multiply
    1,145.92x = 1,716.60 × 854.32
  4. Step 4: Simplify right side
    1,145.92x = 1,466,525.71
  5. Step 5: Solve for x
    x = 1,466,525.71/1,145.92
  6. Step 6: Final answer
    x = 1,279.78

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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.