Home / 2,145.10-3,215.97-847.54

Finding the Fourth Proportional to 2,145.10, 3,215.97 and 847.54

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Solution

The fourth proportional to 2,145.10, 3,215.97 and 847.54 is: 1,270.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.10 : 3,215.97 = 847.54 : x
  2. Step 2: Convert to fraction form
    2,145.10/3,215.97 = 847.54/x
  3. Step 3: Cross multiply
    2,145.10x = 3,215.97 × 847.54
  4. Step 4: Simplify right side
    2,145.10x = 2,725,663.21
  5. Step 5: Solve for x
    x = 2,725,663.21/2,145.10
  6. Step 6: Final answer
    x = 1,270.65

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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.