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Finding the Fourth Proportional to 2,125.63, 3,188.46 and 644.86

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Solution

The fourth proportional to 2,125.63, 3,188.46 and 644.86 is: 967.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.63 : 3,188.46 = 644.86 : x
  2. Step 2: Convert to fraction form
    2,125.63/3,188.46 = 644.86/x
  3. Step 3: Cross multiply
    2,125.63x = 3,188.46 × 644.86
  4. Step 4: Simplify right side
    2,125.63x = 2,056,110.32
  5. Step 5: Solve for x
    x = 2,056,110.32/2,125.63
  6. Step 6: Final answer
    x = 967.29

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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.