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Finding the Fourth Proportional to 2,907.87, 4,012.86 and 1,581.58

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Solution

The fourth proportional to 2,907.87, 4,012.86 and 1,581.58 is: 2,182.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.87 : 4,012.86 = 1,581.58 : x
  2. Step 2: Convert to fraction form
    2,907.87/4,012.86 = 1,581.58/x
  3. Step 3: Cross multiply
    2,907.87x = 4,012.86 × 1,581.58
  4. Step 4: Simplify right side
    2,907.87x = 6,346,659.12
  5. Step 5: Solve for x
    x = 6,346,659.12/2,907.87
  6. Step 6: Final answer
    x = 2,182.58

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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.