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Finding the Fourth Proportional to 2,920.10, 4,020.44 and 2,721.38

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Solution

The fourth proportional to 2,920.10, 4,020.44 and 2,721.38 is: 3,746.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.10 : 4,020.44 = 2,721.38 : x
  2. Step 2: Convert to fraction form
    2,920.10/4,020.44 = 2,721.38/x
  3. Step 3: Cross multiply
    2,920.10x = 4,020.44 × 2,721.38
  4. Step 4: Simplify right side
    2,920.10x = 10,941,145.01
  5. Step 5: Solve for x
    x = 10,941,145.01/2,920.10
  6. Step 6: Final answer
    x = 3,746.84

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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.