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Finding the Fourth Proportional to 3,211.71, 4,817.54 and 903.21

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Solution

The fourth proportional to 3,211.71, 4,817.54 and 903.21 is: 1,354.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.71 : 4,817.54 = 903.21 : x
  2. Step 2: Convert to fraction form
    3,211.71/4,817.54 = 903.21/x
  3. Step 3: Cross multiply
    3,211.71x = 4,817.54 × 903.21
  4. Step 4: Simplify right side
    3,211.71x = 4,351,252.56
  5. Step 5: Solve for x
    x = 4,351,252.56/3,211.71
  6. Step 6: Final answer
    x = 1,354.81

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1.5x scale

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.