Home / 1,520.45-2,279.12-699.32

Finding the Fourth Proportional to 1,520.45, 2,279.12 and 699.32

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Solution

The fourth proportional to 1,520.45, 2,279.12 and 699.32 is: 1,048.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.45 : 2,279.12 = 699.32 : x
  2. Step 2: Convert to fraction form
    1,520.45/2,279.12 = 699.32/x
  3. Step 3: Cross multiply
    1,520.45x = 2,279.12 × 699.32
  4. Step 4: Simplify right side
    1,520.45x = 1,593,819.31
  5. Step 5: Solve for x
    x = 1,593,819.31/1,520.45
  6. Step 6: Final answer
    x = 1,048.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.