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Finding the Fourth Proportional to 2,685.90, 4,028.07 and 930.83

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Solution

The fourth proportional to 2,685.90, 4,028.07 and 930.83 is: 1,395.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.90 : 4,028.07 = 930.83 : x
  2. Step 2: Convert to fraction form
    2,685.90/4,028.07 = 930.83/x
  3. Step 3: Cross multiply
    2,685.90x = 4,028.07 × 930.83
  4. Step 4: Simplify right side
    2,685.90x = 3,749,443.74
  5. Step 5: Solve for x
    x = 3,749,443.74/2,685.90
  6. Step 6: Final answer
    x = 1,395.97

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1.5x scale

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.