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Finding the Fourth Proportional to 1,355.36, 2,040.44 and 925.28

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Solution

The fourth proportional to 1,355.36, 2,040.44 and 925.28 is: 1,392.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.36 : 2,040.44 = 925.28 : x
  2. Step 2: Convert to fraction form
    1,355.36/2,040.44 = 925.28/x
  3. Step 3: Cross multiply
    1,355.36x = 2,040.44 × 925.28
  4. Step 4: Simplify right side
    1,355.36x = 1,887,978.32
  5. Step 5: Solve for x
    x = 1,887,978.32/1,355.36
  6. Step 6: Final answer
    x = 1,392.97

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.