Home / 1,930.75-2,662.27-1,398.58

Finding the Fourth Proportional to 1,930.75, 2,662.27 and 1,398.58

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Solution

The fourth proportional to 1,930.75, 2,662.27 and 1,398.58 is: 1,928.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,930.75 : 2,662.27 = 1,398.58 : x
  2. Step 2: Convert to fraction form
    1,930.75/2,662.27 = 1,398.58/x
  3. Step 3: Cross multiply
    1,930.75x = 2,662.27 × 1,398.58
  4. Step 4: Simplify right side
    1,930.75x = 3,723,397.58
  5. Step 5: Solve for x
    x = 3,723,397.58/1,930.75
  6. Step 6: Final answer
    x = 1,928.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.