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Finding the Fourth Proportional to 1,057.76, 1,587.24 and 711.26

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Solution

The fourth proportional to 1,057.76, 1,587.24 and 711.26 is: 1,067.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,057.76 : 1,587.24 = 711.26 : x
  2. Step 2: Convert to fraction form
    1,057.76/1,587.24 = 711.26/x
  3. Step 3: Cross multiply
    1,057.76x = 1,587.24 × 711.26
  4. Step 4: Simplify right side
    1,057.76x = 1,128,940.32
  5. Step 5: Solve for x
    x = 1,128,940.32/1,057.76
  6. Step 6: Final answer
    x = 1,067.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.