Home / 2,120.86-2,923.72-1,489.46

Finding the Fourth Proportional to 2,120.86, 2,923.72 and 1,489.46

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Solution

The fourth proportional to 2,120.86, 2,923.72 and 1,489.46 is: 2,053.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.86 : 2,923.72 = 1,489.46 : x
  2. Step 2: Convert to fraction form
    2,120.86/2,923.72 = 1,489.46/x
  3. Step 3: Cross multiply
    2,120.86x = 2,923.72 × 1,489.46
  4. Step 4: Simplify right side
    2,120.86x = 4,354,763.99
  5. Step 5: Solve for x
    x = 4,354,763.99/2,120.86
  6. Step 6: Final answer
    x = 2,053.30

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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.