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Finding the Fourth Proportional to 2,047.50, 3,071.21 and 815.49

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Solution

The fourth proportional to 2,047.50, 3,071.21 and 815.49 is: 1,223.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,047.50 : 3,071.21 = 815.49 : x
  2. Step 2: Convert to fraction form
    2,047.50/3,071.21 = 815.49/x
  3. Step 3: Cross multiply
    2,047.50x = 3,071.21 × 815.49
  4. Step 4: Simplify right side
    2,047.50x = 2,504,536.97
  5. Step 5: Solve for x
    x = 2,504,536.97/2,047.50
  6. Step 6: Final answer
    x = 1,223.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.