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Finding the Fourth Proportional to 1,125.36, 1,553.58 and 775.44

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Solution

The fourth proportional to 1,125.36, 1,553.58 and 775.44 is: 1,070.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.36 : 1,553.58 = 775.44 : x
  2. Step 2: Convert to fraction form
    1,125.36/1,553.58 = 775.44/x
  3. Step 3: Cross multiply
    1,125.36x = 1,553.58 × 775.44
  4. Step 4: Simplify right side
    1,125.36x = 1,204,708.08
  5. Step 5: Solve for x
    x = 1,204,708.08/1,125.36
  6. Step 6: Final answer
    x = 1,070.51

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.