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Finding the Fourth Proportional to 1,863.54, 2,795.65 and 767.31

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Solution

The fourth proportional to 1,863.54, 2,795.65 and 767.31 is: 1,151.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.54 : 2,795.65 = 767.31 : x
  2. Step 2: Convert to fraction form
    1,863.54/2,795.65 = 767.31/x
  3. Step 3: Cross multiply
    1,863.54x = 2,795.65 × 767.31
  4. Step 4: Simplify right side
    1,863.54x = 2,145,117.80
  5. Step 5: Solve for x
    x = 2,145,117.80/1,863.54
  6. Step 6: Final answer
    x = 1,151.10

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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.