Home / 2,985.28-4,120.14-2,148.75

Finding the Fourth Proportional to 2,985.28, 4,120.14 and 2,148.75

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Solution

The fourth proportional to 2,985.28, 4,120.14 and 2,148.75 is: 2,965.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.28 : 4,120.14 = 2,148.75 : x
  2. Step 2: Convert to fraction form
    2,985.28/4,120.14 = 2,148.75/x
  3. Step 3: Cross multiply
    2,985.28x = 4,120.14 × 2,148.75
  4. Step 4: Simplify right side
    2,985.28x = 8,853,164.43
  5. Step 5: Solve for x
    x = 8,853,164.43/2,985.28
  6. Step 6: Final answer
    x = 2,965.61

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Double scale
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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.