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Finding the Fourth Proportional to 1,237.96, 1,707.75 and 839.65

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Solution

The fourth proportional to 1,237.96, 1,707.75 and 839.65 is: 1,158.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.96 : 1,707.75 = 839.65 : x
  2. Step 2: Convert to fraction form
    1,237.96/1,707.75 = 839.65/x
  3. Step 3: Cross multiply
    1,237.96x = 1,707.75 × 839.65
  4. Step 4: Simplify right side
    1,237.96x = 1,433,912.29
  5. Step 5: Solve for x
    x = 1,433,912.29/1,237.96
  6. Step 6: Final answer
    x = 1,158.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.