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Finding the Fourth Proportional to 1,861.79, 2,792.99 and 629.28

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Solution

The fourth proportional to 1,861.79, 2,792.99 and 629.28 is: 944.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.79 : 2,792.99 = 629.28 : x
  2. Step 2: Convert to fraction form
    1,861.79/2,792.99 = 629.28/x
  3. Step 3: Cross multiply
    1,861.79x = 2,792.99 × 629.28
  4. Step 4: Simplify right side
    1,861.79x = 1,757,555.64
  5. Step 5: Solve for x
    x = 1,757,555.64/1,861.79
  6. Step 6: Final answer
    x = 944.01

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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.