Home / 2,790.40-4,186.29-1,970.26

Finding the Fourth Proportional to 2,790.40, 4,186.29 and 1,970.26

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Solution

The fourth proportional to 2,790.40, 4,186.29 and 1,970.26 is: 2,955.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.40 : 4,186.29 = 1,970.26 : x
  2. Step 2: Convert to fraction form
    2,790.40/4,186.29 = 1,970.26/x
  3. Step 3: Cross multiply
    2,790.40x = 4,186.29 × 1,970.26
  4. Step 4: Simplify right side
    2,790.40x = 8,248,079.74
  5. Step 5: Solve for x
    x = 8,248,079.74/2,790.40
  6. Step 6: Final answer
    x = 2,955.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.