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Finding the Fourth Proportional to 3,197.66, 4,787.82 and 1,655.42

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Solution

The fourth proportional to 3,197.66, 4,787.82 and 1,655.42 is: 2,478.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,197.66 : 4,787.82 = 1,655.42 : x
  2. Step 2: Convert to fraction form
    3,197.66/4,787.82 = 1,655.42/x
  3. Step 3: Cross multiply
    3,197.66x = 4,787.82 × 1,655.42
  4. Step 4: Simplify right side
    3,197.66x = 7,925,852.98
  5. Step 5: Solve for x
    x = 7,925,852.98/3,197.66
  6. Step 6: Final answer
    x = 2,478.64

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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.