Home / 2,164.98-2,987.96-1,220.95

Finding the Fourth Proportional to 2,164.98, 2,987.96 and 1,220.95

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Solution

The fourth proportional to 2,164.98, 2,987.96 and 1,220.95 is: 1,685.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,164.98 : 2,987.96 = 1,220.95 : x
  2. Step 2: Convert to fraction form
    2,164.98/2,987.96 = 1,220.95/x
  3. Step 3: Cross multiply
    2,164.98x = 2,987.96 × 1,220.95
  4. Step 4: Simplify right side
    2,164.98x = 3,648,149.76
  5. Step 5: Solve for x
    x = 3,648,149.76/2,164.98
  6. Step 6: Final answer
    x = 1,685.07

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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.