Home / 1,107.20-1,660.80-528.32

Finding the Fourth Proportional to 1,107.20, 1,660.80 and 528.32

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Solution

The fourth proportional to 1,107.20, 1,660.80 and 528.32 is: 792.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.20 : 1,660.80 = 528.32 : x
  2. Step 2: Convert to fraction form
    1,107.20/1,660.80 = 528.32/x
  3. Step 3: Cross multiply
    1,107.20x = 1,660.80 × 528.32
  4. Step 4: Simplify right side
    1,107.20x = 877,433.86
  5. Step 5: Solve for x
    x = 877,433.86/1,107.20
  6. Step 6: Final answer
    x = 792.48

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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.