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Finding the Fourth Proportional to 1,069.67, 1,476.21 and 755.04

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Solution

The fourth proportional to 1,069.67, 1,476.21 and 755.04 is: 1,042.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.67 : 1,476.21 = 755.04 : x
  2. Step 2: Convert to fraction form
    1,069.67/1,476.21 = 755.04/x
  3. Step 3: Cross multiply
    1,069.67x = 1,476.21 × 755.04
  4. Step 4: Simplify right side
    1,069.67x = 1,114,593.41
  5. Step 5: Solve for x
    x = 1,114,593.41/1,069.67
  6. Step 6: Final answer
    x = 1,042.00

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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.