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Finding the Fourth Proportional to 1,790.94, 2,685.32 and 620.34

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Solution

The fourth proportional to 1,790.94, 2,685.32 and 620.34 is: 930.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.94 : 2,685.32 = 620.34 : x
  2. Step 2: Convert to fraction form
    1,790.94/2,685.32 = 620.34/x
  3. Step 3: Cross multiply
    1,790.94x = 2,685.32 × 620.34
  4. Step 4: Simplify right side
    1,790.94x = 1,665,811.41
  5. Step 5: Solve for x
    x = 1,665,811.41/1,790.94
  6. Step 6: Final answer
    x = 930.13

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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.