Home / 1,400.14-1,930.80-1,151.20

Finding the Fourth Proportional to 1,400.14, 1,930.80 and 1,151.20

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Solution

The fourth proportional to 1,400.14, 1,930.80 and 1,151.20 is: 1,587.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.14 : 1,930.80 = 1,151.20 : x
  2. Step 2: Convert to fraction form
    1,400.14/1,930.80 = 1,151.20/x
  3. Step 3: Cross multiply
    1,400.14x = 1,930.80 × 1,151.20
  4. Step 4: Simplify right side
    1,400.14x = 2,222,736.96
  5. Step 5: Solve for x
    x = 2,222,736.96/1,400.14
  6. Step 6: Final answer
    x = 1,587.51

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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.