Home / 2,215.50-3,057.80-1,284

Finding the Fourth Proportional to 2,215.50, 3,057.80 and 1,284

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Solution

The fourth proportional to 2,215.50, 3,057.80 and 1,284 is: 1,772.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.50 : 3,057.80 = 1,284 : x
  2. Step 2: Convert to fraction form
    2,215.50/3,057.80 = 1,284/x
  3. Step 3: Cross multiply
    2,215.50x = 3,057.80 × 1,284
  4. Step 4: Simplify right side
    2,215.50x = 3,926,215.20
  5. Step 5: Solve for x
    x = 3,926,215.20/2,215.50
  6. Step 6: Final answer
    x = 1,772.16

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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.