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Finding the Fourth Proportional to 1,734.68, 2,601.90 and 638.84

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Solution

The fourth proportional to 1,734.68, 2,601.90 and 638.84 is: 958.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,734.68 : 2,601.90 = 638.84 : x
  2. Step 2: Convert to fraction form
    1,734.68/2,601.90 = 638.84/x
  3. Step 3: Cross multiply
    1,734.68x = 2,601.90 × 638.84
  4. Step 4: Simplify right side
    1,734.68x = 1,662,197.80
  5. Step 5: Solve for x
    x = 1,662,197.80/1,734.68
  6. Step 6: Final answer
    x = 958.22

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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.