Home / 2,987.17-4,122.56-1,661.20

Finding the Fourth Proportional to 2,987.17, 4,122.56 and 1,661.20

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Solution

The fourth proportional to 2,987.17, 4,122.56 and 1,661.20 is: 2,292.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.17 : 4,122.56 = 1,661.20 : x
  2. Step 2: Convert to fraction form
    2,987.17/4,122.56 = 1,661.20/x
  3. Step 3: Cross multiply
    2,987.17x = 4,122.56 × 1,661.20
  4. Step 4: Simplify right side
    2,987.17x = 6,848,390.52
  5. Step 5: Solve for x
    x = 6,848,390.52/2,987.17
  6. Step 6: Final answer
    x = 2,292.60

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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.