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Finding the Fourth Proportional to 1,165.52, 1,745.40 and 1,142.24

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Solution

The fourth proportional to 1,165.52, 1,745.40 and 1,142.24 is: 1,710.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.52 : 1,745.40 = 1,142.24 : x
  2. Step 2: Convert to fraction form
    1,165.52/1,745.40 = 1,142.24/x
  3. Step 3: Cross multiply
    1,165.52x = 1,745.40 × 1,142.24
  4. Step 4: Simplify right side
    1,165.52x = 1,993,665.70
  5. Step 5: Solve for x
    x = 1,993,665.70/1,165.52
  6. Step 6: Final answer
    x = 1,710.54

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1.5x scale

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.