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Finding the Fourth Proportional to 1,908.12, 2,860.56 and 608.88

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Solution

The fourth proportional to 1,908.12, 2,860.56 and 608.88 is: 912.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908.12 : 2,860.56 = 608.88 : x
  2. Step 2: Convert to fraction form
    1,908.12/2,860.56 = 608.88/x
  3. Step 3: Cross multiply
    1,908.12x = 2,860.56 × 608.88
  4. Step 4: Simplify right side
    1,908.12x = 1,741,737.77
  5. Step 5: Solve for x
    x = 1,741,737.77/1,908.12
  6. Step 6: Final answer
    x = 912.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.