Home / 2,121.45-2,927.52-1,177.20

Finding the Fourth Proportional to 2,121.45, 2,927.52 and 1,177.20

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Solution

The fourth proportional to 2,121.45, 2,927.52 and 1,177.20 is: 1,624.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.45 : 2,927.52 = 1,177.20 : x
  2. Step 2: Convert to fraction form
    2,121.45/2,927.52 = 1,177.20/x
  3. Step 3: Cross multiply
    2,121.45x = 2,927.52 × 1,177.20
  4. Step 4: Simplify right side
    2,121.45x = 3,446,276.54
  5. Step 5: Solve for x
    x = 3,446,276.54/2,121.45
  6. Step 6: Final answer
    x = 1,624.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.