Home / 2,165.14-2,987.98-1,220.97

Finding the Fourth Proportional to 2,165.14, 2,987.98 and 1,220.97

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Solution

The fourth proportional to 2,165.14, 2,987.98 and 1,220.97 is: 1,684.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.14 : 2,987.98 = 1,220.97 : x
  2. Step 2: Convert to fraction form
    2,165.14/2,987.98 = 1,220.97/x
  3. Step 3: Cross multiply
    2,165.14x = 2,987.98 × 1,220.97
  4. Step 4: Simplify right side
    2,165.14x = 3,648,233.94
  5. Step 5: Solve for x
    x = 3,648,233.94/2,165.14
  6. Step 6: Final answer
    x = 1,684.99

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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.