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Finding the Fourth Proportional to 2,907.90, 4,012.94 and 1,789.46

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Solution

The fourth proportional to 2,907.90, 4,012.94 and 1,789.46 is: 2,469.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.90 : 4,012.94 = 1,789.46 : x
  2. Step 2: Convert to fraction form
    2,907.90/4,012.94 = 1,789.46/x
  3. Step 3: Cross multiply
    2,907.90x = 4,012.94 × 1,789.46
  4. Step 4: Simplify right side
    2,907.90x = 7,180,995.61
  5. Step 5: Solve for x
    x = 7,180,995.61/2,907.90
  6. Step 6: Final answer
    x = 2,469.48

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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.