Home / 2,678.47-4,012.84-2,620.15

Finding the Fourth Proportional to 2,678.47, 4,012.84 and 2,620.15

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Solution

The fourth proportional to 2,678.47, 4,012.84 and 2,620.15 is: 3,925.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,678.47 : 4,012.84 = 2,620.15 : x
  2. Step 2: Convert to fraction form
    2,678.47/4,012.84 = 2,620.15/x
  3. Step 3: Cross multiply
    2,678.47x = 4,012.84 × 2,620.15
  4. Step 4: Simplify right side
    2,678.47x = 10,514,235.97
  5. Step 5: Solve for x
    x = 10,514,235.97/2,678.47
  6. Step 6: Final answer
    x = 3,925.47

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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.