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Finding the Fourth Proportional to 3,314.89, 4,972.31 and 849.70

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Solution

The fourth proportional to 3,314.89, 4,972.31 and 849.70 is: 1,274.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,314.89 : 4,972.31 = 849.70 : x
  2. Step 2: Convert to fraction form
    3,314.89/4,972.31 = 849.70/x
  3. Step 3: Cross multiply
    3,314.89x = 4,972.31 × 849.70
  4. Step 4: Simplify right side
    3,314.89x = 4,224,971.81
  5. Step 5: Solve for x
    x = 4,224,971.81/3,314.89
  6. Step 6: Final answer
    x = 1,274.54

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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.