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Finding the Fourth Proportional to 2,620.47, 3,930.27 and 976.58

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Solution

The fourth proportional to 2,620.47, 3,930.27 and 976.58 is: 1,464.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.47 : 3,930.27 = 976.58 : x
  2. Step 2: Convert to fraction form
    2,620.47/3,930.27 = 976.58/x
  3. Step 3: Cross multiply
    2,620.47x = 3,930.27 × 976.58
  4. Step 4: Simplify right side
    2,620.47x = 3,838,223.08
  5. Step 5: Solve for x
    x = 3,838,223.08/2,620.47
  6. Step 6: Final answer
    x = 1,464.71

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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.