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Finding the Fourth Proportional to 1,107.03, 1,518.81 and 1,078.29

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Solution

The fourth proportional to 1,107.03, 1,518.81 and 1,078.29 is: 1,479.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.03 : 1,518.81 = 1,078.29 : x
  2. Step 2: Convert to fraction form
    1,107.03/1,518.81 = 1,078.29/x
  3. Step 3: Cross multiply
    1,107.03x = 1,518.81 × 1,078.29
  4. Step 4: Simplify right side
    1,107.03x = 1,637,717.63
  5. Step 5: Solve for x
    x = 1,637,717.63/1,107.03
  6. Step 6: Final answer
    x = 1,479.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.