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Finding the Fourth Proportional to 2,644.48, 3,966.98 and 912.88

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Solution

The fourth proportional to 2,644.48, 3,966.98 and 912.88 is: 1,369.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,644.48 : 3,966.98 = 912.88 : x
  2. Step 2: Convert to fraction form
    2,644.48/3,966.98 = 912.88/x
  3. Step 3: Cross multiply
    2,644.48x = 3,966.98 × 912.88
  4. Step 4: Simplify right side
    2,644.48x = 3,621,376.70
  5. Step 5: Solve for x
    x = 3,621,376.70/2,644.48
  6. Step 6: Final answer
    x = 1,369.41

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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.