Home / 1,288.47-1,930.68-1,150.77

Finding the Fourth Proportional to 1,288.47, 1,930.68 and 1,150.77

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Solution

The fourth proportional to 1,288.47, 1,930.68 and 1,150.77 is: 1,724.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.47 : 1,930.68 = 1,150.77 : x
  2. Step 2: Convert to fraction form
    1,288.47/1,930.68 = 1,150.77/x
  3. Step 3: Cross multiply
    1,288.47x = 1,930.68 × 1,150.77
  4. Step 4: Simplify right side
    1,288.47x = 2,221,768.62
  5. Step 5: Solve for x
    x = 2,221,768.62/1,288.47
  6. Step 6: Final answer
    x = 1,724.35

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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.