Home / 2,780.76-3,837.44-1,538.76

Finding the Fourth Proportional to 2,780.76, 3,837.44 and 1,538.76

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Solution

The fourth proportional to 2,780.76, 3,837.44 and 1,538.76 is: 2,123.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.76 : 3,837.44 = 1,538.76 : x
  2. Step 2: Convert to fraction form
    2,780.76/3,837.44 = 1,538.76/x
  3. Step 3: Cross multiply
    2,780.76x = 3,837.44 × 1,538.76
  4. Step 4: Simplify right side
    2,780.76x = 5,904,899.17
  5. Step 5: Solve for x
    x = 5,904,899.17/2,780.76
  6. Step 6: Final answer
    x = 2,123.48

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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.