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Finding the Fourth Proportional to 1,790.66, 2,685.80 and 620.54

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Solution

The fourth proportional to 1,790.66, 2,685.80 and 620.54 is: 930.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.66 : 2,685.80 = 620.54 : x
  2. Step 2: Convert to fraction form
    1,790.66/2,685.80 = 620.54/x
  3. Step 3: Cross multiply
    1,790.66x = 2,685.80 × 620.54
  4. Step 4: Simplify right side
    1,790.66x = 1,666,646.33
  5. Step 5: Solve for x
    x = 1,666,646.33/1,790.66
  6. Step 6: Final answer
    x = 930.74

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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.