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Finding the Fourth Proportional to 1,069.81, 1,476.33 and 751.22

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Solution

The fourth proportional to 1,069.81, 1,476.33 and 751.22 is: 1,036.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.81 : 1,476.33 = 751.22 : x
  2. Step 2: Convert to fraction form
    1,069.81/1,476.33 = 751.22/x
  3. Step 3: Cross multiply
    1,069.81x = 1,476.33 × 751.22
  4. Step 4: Simplify right side
    1,069.81x = 1,109,052.26
  5. Step 5: Solve for x
    x = 1,109,052.26/1,069.81
  6. Step 6: Final answer
    x = 1,036.68

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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.