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Finding the Fourth Proportional to 1,007.49, 1,388.97 and 746.13

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Solution

The fourth proportional to 1,007.49, 1,388.97 and 746.13 is: 1,028.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.49 : 1,388.97 = 746.13 : x
  2. Step 2: Convert to fraction form
    1,007.49/1,388.97 = 746.13/x
  3. Step 3: Cross multiply
    1,007.49x = 1,388.97 × 746.13
  4. Step 4: Simplify right side
    1,007.49x = 1,036,352.19
  5. Step 5: Solve for x
    x = 1,036,352.19/1,007.49
  6. Step 6: Final answer
    x = 1,028.65

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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.