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Finding the Fourth Proportional to 5,644.40, 7,789.25 and 3,160.40

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Solution

The fourth proportional to 5,644.40, 7,789.25 and 3,160.40 is: 4,361.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,644.40 : 7,789.25 = 3,160.40 : x
  2. Step 2: Convert to fraction form
    5,644.40/7,789.25 = 3,160.40/x
  3. Step 3: Cross multiply
    5,644.40x = 7,789.25 × 3,160.40
  4. Step 4: Simplify right side
    5,644.40x = 24,617,145.70
  5. Step 5: Solve for x
    x = 24,617,145.70/5,644.40
  6. Step 6: Final answer
    x = 4,361.34

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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.