Home / 1,913.19-2,639.72-1,127.09

Finding the Fourth Proportional to 1,913.19, 2,639.72 and 1,127.09

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Solution

The fourth proportional to 1,913.19, 2,639.72 and 1,127.09 is: 1,555.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.19 : 2,639.72 = 1,127.09 : x
  2. Step 2: Convert to fraction form
    1,913.19/2,639.72 = 1,127.09/x
  3. Step 3: Cross multiply
    1,913.19x = 2,639.72 × 1,127.09
  4. Step 4: Simplify right side
    1,913.19x = 2,975,183.18
  5. Step 5: Solve for x
    x = 2,975,183.18/1,913.19
  6. Step 6: Final answer
    x = 1,555.09

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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.