Home / 2,900.80-4,004.40-1,722.25

Finding the Fourth Proportional to 2,900.80, 4,004.40 and 1,722.25

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Solution

The fourth proportional to 2,900.80, 4,004.40 and 1,722.25 is: 2,377.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,900.80 : 4,004.40 = 1,722.25 : x
  2. Step 2: Convert to fraction form
    2,900.80/4,004.40 = 1,722.25/x
  3. Step 3: Cross multiply
    2,900.80x = 4,004.40 × 1,722.25
  4. Step 4: Simplify right side
    2,900.80x = 6,896,577.90
  5. Step 5: Solve for x
    x = 6,896,577.90/2,900.80
  6. Step 6: Final answer
    x = 2,377.47

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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.