Home / 1,281.24-1,911.51-1,142.73

Finding the Fourth Proportional to 1,281.24, 1,911.51 and 1,142.73

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Solution

The fourth proportional to 1,281.24, 1,911.51 and 1,142.73 is: 1,704.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.24 : 1,911.51 = 1,142.73 : x
  2. Step 2: Convert to fraction form
    1,281.24/1,911.51 = 1,142.73/x
  3. Step 3: Cross multiply
    1,281.24x = 1,911.51 × 1,142.73
  4. Step 4: Simplify right side
    1,281.24x = 2,184,339.82
  5. Step 5: Solve for x
    x = 2,184,339.82/1,281.24
  6. Step 6: Final answer
    x = 1,704.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.