Home / 2,164.47-2,987.06-1,220.64

Finding the Fourth Proportional to 2,164.47, 2,987.06 and 1,220.64

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Solution

The fourth proportional to 2,164.47, 2,987.06 and 1,220.64 is: 1,684.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,164.47 : 2,987.06 = 1,220.64 : x
  2. Step 2: Convert to fraction form
    2,164.47/2,987.06 = 1,220.64/x
  3. Step 3: Cross multiply
    2,164.47x = 2,987.06 × 1,220.64
  4. Step 4: Simplify right side
    2,164.47x = 3,646,118.82
  5. Step 5: Solve for x
    x = 3,646,118.82/2,164.47
  6. Step 6: Final answer
    x = 1,684.53

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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.