Home / 2,620.88-3,930.96-977.36

Finding the Fourth Proportional to 2,620.88, 3,930.96 and 977.36

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Solution

The fourth proportional to 2,620.88, 3,930.96 and 977.36 is: 1,465.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.88 : 3,930.96 = 977.36 : x
  2. Step 2: Convert to fraction form
    2,620.88/3,930.96 = 977.36/x
  3. Step 3: Cross multiply
    2,620.88x = 3,930.96 × 977.36
  4. Step 4: Simplify right side
    2,620.88x = 3,841,963.07
  5. Step 5: Solve for x
    x = 3,841,963.07/2,620.88
  6. Step 6: Final answer
    x = 1,465.91

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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.