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Finding the Fourth Proportional to 1,734.37, 2,601.47 and 638.66

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Solution

The fourth proportional to 1,734.37, 2,601.47 and 638.66 is: 957.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,734.37 : 2,601.47 = 638.66 : x
  2. Step 2: Convert to fraction form
    1,734.37/2,601.47 = 638.66/x
  3. Step 3: Cross multiply
    1,734.37x = 2,601.47 × 638.66
  4. Step 4: Simplify right side
    1,734.37x = 1,661,454.83
  5. Step 5: Solve for x
    x = 1,661,454.83/1,734.37
  6. Step 6: Final answer
    x = 957.96

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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.