Home / 1,907.36-2,631.86-1,121.56

Finding the Fourth Proportional to 1,907.36, 2,631.86 and 1,121.56

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Solution

The fourth proportional to 1,907.36, 2,631.86 and 1,121.56 is: 1,547.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.36 : 2,631.86 = 1,121.56 : x
  2. Step 2: Convert to fraction form
    1,907.36/2,631.86 = 1,121.56/x
  3. Step 3: Cross multiply
    1,907.36x = 2,631.86 × 1,121.56
  4. Step 4: Simplify right side
    1,907.36x = 2,951,788.90
  5. Step 5: Solve for x
    x = 2,951,788.90/1,907.36
  6. Step 6: Final answer
    x = 1,547.58

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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.