Home / 1,515.80-2,272.56-693.64

Finding the Fourth Proportional to 1,515.80, 2,272.56 and 693.64

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Solution

The fourth proportional to 1,515.80, 2,272.56 and 693.64 is: 1,039.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.80 : 2,272.56 = 693.64 : x
  2. Step 2: Convert to fraction form
    1,515.80/2,272.56 = 693.64/x
  3. Step 3: Cross multiply
    1,515.80x = 2,272.56 × 693.64
  4. Step 4: Simplify right side
    1,515.80x = 1,576,338.52
  5. Step 5: Solve for x
    x = 1,576,338.52/1,515.80
  6. Step 6: Final answer
    x = 1,039.94

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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.