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Finding the Fourth Proportional to 2,613.92, 3,921.46 and 970.46

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Solution

The fourth proportional to 2,613.92, 3,921.46 and 970.46 is: 1,455.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,613.92 : 3,921.46 = 970.46 : x
  2. Step 2: Convert to fraction form
    2,613.92/3,921.46 = 970.46/x
  3. Step 3: Cross multiply
    2,613.92x = 3,921.46 × 970.46
  4. Step 4: Simplify right side
    2,613.92x = 3,805,620.07
  5. Step 5: Solve for x
    x = 3,805,620.07/2,613.92
  6. Step 6: Final answer
    x = 1,455.91

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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.