Home / 2,911.32-4,367.16-720.09

Finding the Fourth Proportional to 2,911.32, 4,367.16 and 720.09

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Solution

The fourth proportional to 2,911.32, 4,367.16 and 720.09 is: 1,080.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.32 : 4,367.16 = 720.09 : x
  2. Step 2: Convert to fraction form
    2,911.32/4,367.16 = 720.09/x
  3. Step 3: Cross multiply
    2,911.32x = 4,367.16 × 720.09
  4. Step 4: Simplify right side
    2,911.32x = 3,144,748.24
  5. Step 5: Solve for x
    x = 3,144,748.24/2,911.32
  6. Step 6: Final answer
    x = 1,080.18

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1.5x scale

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.