Home / 2,125.10-3,188.10-644.20

Finding the Fourth Proportional to 2,125.10, 3,188.10 and 644.20

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Solution

The fourth proportional to 2,125.10, 3,188.10 and 644.20 is: 966.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.10 : 3,188.10 = 644.20 : x
  2. Step 2: Convert to fraction form
    2,125.10/3,188.10 = 644.20/x
  3. Step 3: Cross multiply
    2,125.10x = 3,188.10 × 644.20
  4. Step 4: Simplify right side
    2,125.10x = 2,053,774.02
  5. Step 5: Solve for x
    x = 2,053,774.02/2,125.10
  6. Step 6: Final answer
    x = 966.44

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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.