Home / 1,515.87-2,090.78-1,338.52

Finding the Fourth Proportional to 1,515.87, 2,090.78 and 1,338.52

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Solution

The fourth proportional to 1,515.87, 2,090.78 and 1,338.52 is: 1,846.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.87 : 2,090.78 = 1,338.52 : x
  2. Step 2: Convert to fraction form
    1,515.87/2,090.78 = 1,338.52/x
  3. Step 3: Cross multiply
    1,515.87x = 2,090.78 × 1,338.52
  4. Step 4: Simplify right side
    1,515.87x = 2,798,553.75
  5. Step 5: Solve for x
    x = 2,798,553.75/1,515.87
  6. Step 6: Final answer
    x = 1,846.16

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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.