Home / 2,164.48-2,987.27-1,220.45

Finding the Fourth Proportional to 2,164.48, 2,987.27 and 1,220.45

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Solution

The fourth proportional to 2,164.48, 2,987.27 and 1,220.45 is: 1,684.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,164.48 : 2,987.27 = 1,220.45 : x
  2. Step 2: Convert to fraction form
    2,164.48/2,987.27 = 1,220.45/x
  3. Step 3: Cross multiply
    2,164.48x = 2,987.27 × 1,220.45
  4. Step 4: Simplify right side
    2,164.48x = 3,645,813.67
  5. Step 5: Solve for x
    x = 3,645,813.67/2,164.48
  6. Step 6: Final answer
    x = 1,684.38

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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.