Home / 1,907.39-2,631.62-1,121.69

Finding the Fourth Proportional to 1,907.39, 2,631.62 and 1,121.69

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Solution

The fourth proportional to 1,907.39, 2,631.62 and 1,121.69 is: 1,547.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.39 : 2,631.62 = 1,121.69 : x
  2. Step 2: Convert to fraction form
    1,907.39/2,631.62 = 1,121.69/x
  3. Step 3: Cross multiply
    1,907.39x = 2,631.62 × 1,121.69
  4. Step 4: Simplify right side
    1,907.39x = 2,951,856.23
  5. Step 5: Solve for x
    x = 2,951,856.23/1,907.39
  6. Step 6: Final answer
    x = 1,547.59

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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.