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Finding the Fourth Proportional to 2,612.97, 3,920.99 and 970.65

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Solution

The fourth proportional to 2,612.97, 3,920.99 and 970.65 is: 1,456.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,612.97 : 3,920.99 = 970.65 : x
  2. Step 2: Convert to fraction form
    2,612.97/3,920.99 = 970.65/x
  3. Step 3: Cross multiply
    2,612.97x = 3,920.99 × 970.65
  4. Step 4: Simplify right side
    2,612.97x = 3,805,904.09
  5. Step 5: Solve for x
    x = 3,805,904.09/2,612.97
  6. Step 6: Final answer
    x = 1,456.54

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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.