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Finding the Fourth Proportional to 1,035.38, 1,428.25 and 681.37

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Solution

The fourth proportional to 1,035.38, 1,428.25 and 681.37 is: 939.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.38 : 1,428.25 = 681.37 : x
  2. Step 2: Convert to fraction form
    1,035.38/1,428.25 = 681.37/x
  3. Step 3: Cross multiply
    1,035.38x = 1,428.25 × 681.37
  4. Step 4: Simplify right side
    1,035.38x = 973,166.70
  5. Step 5: Solve for x
    x = 973,166.70/1,035.38
  6. Step 6: Final answer
    x = 939.91

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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.