Home / 2,121.18-2,927.07-1,189.50

Finding the Fourth Proportional to 2,121.18, 2,927.07 and 1,189.50

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Solution

The fourth proportional to 2,121.18, 2,927.07 and 1,189.50 is: 1,641.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.18 : 2,927.07 = 1,189.50 : x
  2. Step 2: Convert to fraction form
    2,121.18/2,927.07 = 1,189.50/x
  3. Step 3: Cross multiply
    2,121.18x = 2,927.07 × 1,189.50
  4. Step 4: Simplify right side
    2,121.18x = 3,481,749.77
  5. Step 5: Solve for x
    x = 3,481,749.77/2,121.18
  6. Step 6: Final answer
    x = 1,641.42

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1.5x scale

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.