Home / 2,780.22-3,840.88-1,825.40

Finding the Fourth Proportional to 2,780.22, 3,840.88 and 1,825.40

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Solution

The fourth proportional to 2,780.22, 3,840.88 and 1,825.40 is: 2,521.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.22 : 3,840.88 = 1,825.40 : x
  2. Step 2: Convert to fraction form
    2,780.22/3,840.88 = 1,825.40/x
  3. Step 3: Cross multiply
    2,780.22x = 3,840.88 × 1,825.40
  4. Step 4: Simplify right side
    2,780.22x = 7,011,125.47
  5. Step 5: Solve for x
    x = 7,011,125.47/2,780.22
  6. Step 6: Final answer
    x = 2,521.78

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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.