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Finding the Fourth Proportional to 1,862.71, 2,792.31 and 629.50

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Solution

The fourth proportional to 1,862.71, 2,792.31 and 629.50 is: 943.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,862.71 : 2,792.31 = 629.50 : x
  2. Step 2: Convert to fraction form
    1,862.71/2,792.31 = 629.50/x
  3. Step 3: Cross multiply
    1,862.71x = 2,792.31 × 629.50
  4. Step 4: Simplify right side
    1,862.71x = 1,757,759.15
  5. Step 5: Solve for x
    x = 1,757,759.15/1,862.71
  6. Step 6: Final answer
    x = 943.66

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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.