Home / 1,911.76-2,868.12-613.24

Finding the Fourth Proportional to 1,911.76, 2,868.12 and 613.24

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Solution

The fourth proportional to 1,911.76, 2,868.12 and 613.24 is: 920.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.76 : 2,868.12 = 613.24 : x
  2. Step 2: Convert to fraction form
    1,911.76/2,868.12 = 613.24/x
  3. Step 3: Cross multiply
    1,911.76x = 2,868.12 × 613.24
  4. Step 4: Simplify right side
    1,911.76x = 1,758,845.91
  5. Step 5: Solve for x
    x = 1,758,845.91/1,911.76
  6. Step 6: Final answer
    x = 920.01

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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.