Home / 2,120.79-2,925.71-1,374.99

Finding the Fourth Proportional to 2,120.79, 2,925.71 and 1,374.99

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Solution

The fourth proportional to 2,120.79, 2,925.71 and 1,374.99 is: 1,896.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.79 : 2,925.71 = 1,374.99 : x
  2. Step 2: Convert to fraction form
    2,120.79/2,925.71 = 1,374.99/x
  3. Step 3: Cross multiply
    2,120.79x = 2,925.71 × 1,374.99
  4. Step 4: Simplify right side
    2,120.79x = 4,022,821.99
  5. Step 5: Solve for x
    x = 4,022,821.99/2,120.79
  6. Step 6: Final answer
    x = 1,896.85

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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.