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Finding the Fourth Proportional to 1,527.49, 2,107.81 and 864.41

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Solution

The fourth proportional to 1,527.49, 2,107.81 and 864.41 is: 1,192.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,527.49 : 2,107.81 = 864.41 : x
  2. Step 2: Convert to fraction form
    1,527.49/2,107.81 = 864.41/x
  3. Step 3: Cross multiply
    1,527.49x = 2,107.81 × 864.41
  4. Step 4: Simplify right side
    1,527.49x = 1,821,997.72
  5. Step 5: Solve for x
    x = 1,821,997.72/1,527.49
  6. Step 6: Final answer
    x = 1,192.80

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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.