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Finding the Fourth Proportional to 4,992.69, 6,890.22 and 2,868.90

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Solution

The fourth proportional to 4,992.69, 6,890.22 and 2,868.90 is: 3,959.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,992.69 : 6,890.22 = 2,868.90 : x
  2. Step 2: Convert to fraction form
    4,992.69/6,890.22 = 2,868.90/x
  3. Step 3: Cross multiply
    4,992.69x = 6,890.22 × 2,868.90
  4. Step 4: Simplify right side
    4,992.69x = 19,767,352.16
  5. Step 5: Solve for x
    x = 19,767,352.16/4,992.69
  6. Step 6: Final answer
    x = 3,959.26

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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.