Home / 2,165.52-2,988.46-1,221.47

Finding the Fourth Proportional to 2,165.52, 2,988.46 and 1,221.47

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Solution

The fourth proportional to 2,165.52, 2,988.46 and 1,221.47 is: 1,685.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.52 : 2,988.46 = 1,221.47 : x
  2. Step 2: Convert to fraction form
    2,165.52/2,988.46 = 1,221.47/x
  3. Step 3: Cross multiply
    2,165.52x = 2,988.46 × 1,221.47
  4. Step 4: Simplify right side
    2,165.52x = 3,650,314.24
  5. Step 5: Solve for x
    x = 3,650,314.24/2,165.52
  6. Step 6: Final answer
    x = 1,685.65

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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.