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Finding the Fourth Proportional to 1,243.97, 1,867.54 and 776.16

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Solution

The fourth proportional to 1,243.97, 1,867.54 and 776.16 is: 1,165.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.97 : 1,867.54 = 776.16 : x
  2. Step 2: Convert to fraction form
    1,243.97/1,867.54 = 776.16/x
  3. Step 3: Cross multiply
    1,243.97x = 1,867.54 × 776.16
  4. Step 4: Simplify right side
    1,243.97x = 1,449,507.91
  5. Step 5: Solve for x
    x = 1,449,507.91/1,243.97
  6. Step 6: Final answer
    x = 1,165.23

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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.