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Finding the Fourth Proportional to 2,907.63, 3,991.21 and 2,645.19

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Solution

The fourth proportional to 2,907.63, 3,991.21 and 2,645.19 is: 3,630.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.63 : 3,991.21 = 2,645.19 : x
  2. Step 2: Convert to fraction form
    2,907.63/3,991.21 = 2,645.19/x
  3. Step 3: Cross multiply
    2,907.63x = 3,991.21 × 2,645.19
  4. Step 4: Simplify right side
    2,907.63x = 10,557,502.17
  5. Step 5: Solve for x
    x = 10,557,502.17/2,907.63
  6. Step 6: Final answer
    x = 3,630.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.