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Finding the Fourth Proportional to 1,937.22, 2,905.94 and 638.69

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Solution

The fourth proportional to 1,937.22, 2,905.94 and 638.69 is: 958.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,937.22 : 2,905.94 = 638.69 : x
  2. Step 2: Convert to fraction form
    1,937.22/2,905.94 = 638.69/x
  3. Step 3: Cross multiply
    1,937.22x = 2,905.94 × 638.69
  4. Step 4: Simplify right side
    1,937.22x = 1,855,979.19
  5. Step 5: Solve for x
    x = 1,855,979.19/1,937.22
  6. Step 6: Final answer
    x = 958.07

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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.