Home / 1,271.24-1,905.54-531.28

Finding the Fourth Proportional to 1,271.24, 1,905.54 and 531.28

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Solution

The fourth proportional to 1,271.24, 1,905.54 and 531.28 is: 796.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.24 : 1,905.54 = 531.28 : x
  2. Step 2: Convert to fraction form
    1,271.24/1,905.54 = 531.28/x
  3. Step 3: Cross multiply
    1,271.24x = 1,905.54 × 531.28
  4. Step 4: Simplify right side
    1,271.24x = 1,012,372.25
  5. Step 5: Solve for x
    x = 1,012,372.25/1,271.24
  6. Step 6: Final answer
    x = 796.37

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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.