Home / 1,911.53-2,867.18-612.99

Finding the Fourth Proportional to 1,911.53, 2,867.18 and 612.99

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Solution

The fourth proportional to 1,911.53, 2,867.18 and 612.99 is: 919.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.53 : 2,867.18 = 612.99 : x
  2. Step 2: Convert to fraction form
    1,911.53/2,867.18 = 612.99/x
  3. Step 3: Cross multiply
    1,911.53x = 2,867.18 × 612.99
  4. Step 4: Simplify right side
    1,911.53x = 1,757,549.60
  5. Step 5: Solve for x
    x = 1,757,549.60/1,911.53
  6. Step 6: Final answer
    x = 919.45

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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.