Home / 2,121.85-2,928.14-1,237.48

Finding the Fourth Proportional to 2,121.85, 2,928.14 and 1,237.48

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Solution

The fourth proportional to 2,121.85, 2,928.14 and 1,237.48 is: 1,707.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.85 : 2,928.14 = 1,237.48 : x
  2. Step 2: Convert to fraction form
    2,121.85/2,928.14 = 1,237.48/x
  3. Step 3: Cross multiply
    2,121.85x = 2,928.14 × 1,237.48
  4. Step 4: Simplify right side
    2,121.85x = 3,623,510.46
  5. Step 5: Solve for x
    x = 3,623,510.46/2,121.85
  6. Step 6: Final answer
    x = 1,707.71

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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.