Home / 2,071.20-2,861.28-1,915.68

Finding the Fourth Proportional to 2,071.20, 2,861.28 and 1,915.68

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Solution

The fourth proportional to 2,071.20, 2,861.28 and 1,915.68 is: 2,646.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,071.20 : 2,861.28 = 1,915.68 : x
  2. Step 2: Convert to fraction form
    2,071.20/2,861.28 = 1,915.68/x
  3. Step 3: Cross multiply
    2,071.20x = 2,861.28 × 1,915.68
  4. Step 4: Simplify right side
    2,071.20x = 5,481,296.87
  5. Step 5: Solve for x
    x = 5,481,296.87/2,071.20
  6. Step 6: Final answer
    x = 2,646.44

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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.