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Finding the Fourth Proportional to 2,105.04, 3,157.42 and 644.20

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Solution

The fourth proportional to 2,105.04, 3,157.42 and 644.20 is: 966.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,105.04 : 3,157.42 = 644.20 : x
  2. Step 2: Convert to fraction form
    2,105.04/3,157.42 = 644.20/x
  3. Step 3: Cross multiply
    2,105.04x = 3,157.42 × 644.20
  4. Step 4: Simplify right side
    2,105.04x = 2,034,009.96
  5. Step 5: Solve for x
    x = 2,034,009.96/2,105.04
  6. Step 6: Final answer
    x = 966.26

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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.