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Finding the Fourth Proportional to 2,157.40, 3,236.63 and 751.61

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Solution

The fourth proportional to 2,157.40, 3,236.63 and 751.61 is: 1,127.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.40 : 3,236.63 = 751.61 : x
  2. Step 2: Convert to fraction form
    2,157.40/3,236.63 = 751.61/x
  3. Step 3: Cross multiply
    2,157.40x = 3,236.63 × 751.61
  4. Step 4: Simplify right side
    2,157.40x = 2,432,682.57
  5. Step 5: Solve for x
    x = 2,432,682.57/2,157.40
  6. Step 6: Final answer
    x = 1,127.60

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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.