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Finding the Fourth Proportional to 2,907.75, 4,012.80 and 1,581.54

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Solution

The fourth proportional to 2,907.75, 4,012.80 and 1,581.54 is: 2,182.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.75 : 4,012.80 = 1,581.54 : x
  2. Step 2: Convert to fraction form
    2,907.75/4,012.80 = 1,581.54/x
  3. Step 3: Cross multiply
    2,907.75x = 4,012.80 × 1,581.54
  4. Step 4: Simplify right side
    2,907.75x = 6,346,403.71
  5. Step 5: Solve for x
    x = 6,346,403.71/2,907.75
  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.