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Finding the Fourth Proportional to 1,360.72, 2,039.23 and 628.71

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Solution

The fourth proportional to 1,360.72, 2,039.23 and 628.71 is: 942.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,360.72 : 2,039.23 = 628.71 : x
  2. Step 2: Convert to fraction form
    1,360.72/2,039.23 = 628.71/x
  3. Step 3: Cross multiply
    1,360.72x = 2,039.23 × 628.71
  4. Step 4: Simplify right side
    1,360.72x = 1,282,084.29
  5. Step 5: Solve for x
    x = 1,282,084.29/1,360.72
  6. Step 6: Final answer
    x = 942.21

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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.