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Finding the Fourth Proportional to 1,091.10, 1,505.54 and 625.26

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Solution

The fourth proportional to 1,091.10, 1,505.54 and 625.26 is: 862.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.10 : 1,505.54 = 625.26 : x
  2. Step 2: Convert to fraction form
    1,091.10/1,505.54 = 625.26/x
  3. Step 3: Cross multiply
    1,091.10x = 1,505.54 × 625.26
  4. Step 4: Simplify right side
    1,091.10x = 941,353.94
  5. Step 5: Solve for x
    x = 941,353.94/1,091.10
  6. Step 6: Final answer
    x = 862.76

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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.