Home / 2,911.50-4,367.14-720.18

Finding the Fourth Proportional to 2,911.50, 4,367.14 and 720.18

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Solution

The fourth proportional to 2,911.50, 4,367.14 and 720.18 is: 1,080.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.50 : 4,367.14 = 720.18 : x
  2. Step 2: Convert to fraction form
    2,911.50/4,367.14 = 720.18/x
  3. Step 3: Cross multiply
    2,911.50x = 4,367.14 × 720.18
  4. Step 4: Simplify right side
    2,911.50x = 3,145,126.89
  5. Step 5: Solve for x
    x = 3,145,126.89/2,911.50
  6. Step 6: Final answer
    x = 1,080.24

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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.