Home / 1,515.78-2,272.14-1,208.16

Finding the Fourth Proportional to 1,515.78, 2,272.14 and 1,208.16

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Solution

The fourth proportional to 1,515.78, 2,272.14 and 1,208.16 is: 1,811.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.78 : 2,272.14 = 1,208.16 : x
  2. Step 2: Convert to fraction form
    1,515.78/2,272.14 = 1,208.16/x
  3. Step 3: Cross multiply
    1,515.78x = 2,272.14 × 1,208.16
  4. Step 4: Simplify right side
    1,515.78x = 2,745,108.66
  5. Step 5: Solve for x
    x = 2,745,108.66/1,515.78
  6. Step 6: Final answer
    x = 1,811.02

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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.