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Finding the Fourth Proportional to 5,642.45, 7,787.46 and 3,219.82

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Solution

The fourth proportional to 5,642.45, 7,787.46 and 3,219.82 is: 4,443.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,642.45 : 7,787.46 = 3,219.82 : x
  2. Step 2: Convert to fraction form
    5,642.45/7,787.46 = 3,219.82/x
  3. Step 3: Cross multiply
    5,642.45x = 7,787.46 × 3,219.82
  4. Step 4: Simplify right side
    5,642.45x = 25,074,212.06
  5. Step 5: Solve for x
    x = 25,074,212.06/5,642.45
  6. Step 6: Final answer
    x = 4,443.85

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1.5x scale

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.