Home / 2,021.40-2,790.26-1,275.84

Finding the Fourth Proportional to 2,021.40, 2,790.26 and 1,275.84

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Solution

The fourth proportional to 2,021.40, 2,790.26 and 1,275.84 is: 1,761.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.40 : 2,790.26 = 1,275.84 : x
  2. Step 2: Convert to fraction form
    2,021.40/2,790.26 = 1,275.84/x
  3. Step 3: Cross multiply
    2,021.40x = 2,790.26 × 1,275.84
  4. Step 4: Simplify right side
    2,021.40x = 3,559,925.32
  5. Step 5: Solve for x
    x = 3,559,925.32/2,021.40
  6. Step 6: Final answer
    x = 1,761.12

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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.