Home / 1,384.91-1,913.60-1,107.43

Finding the Fourth Proportional to 1,384.91, 1,913.60 and 1,107.43

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Solution

The fourth proportional to 1,384.91, 1,913.60 and 1,107.43 is: 1,530.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.91 : 1,913.60 = 1,107.43 : x
  2. Step 2: Convert to fraction form
    1,384.91/1,913.60 = 1,107.43/x
  3. Step 3: Cross multiply
    1,384.91x = 1,913.60 × 1,107.43
  4. Step 4: Simplify right side
    1,384.91x = 2,119,167.73
  5. Step 5: Solve for x
    x = 2,119,167.73/1,384.91
  6. Step 6: Final answer
    x = 1,530.19

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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.