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Finding the Fourth Proportional to 1,919.70, 2,880.25 and 1,098.68

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Solution

The fourth proportional to 1,919.70, 2,880.25 and 1,098.68 is: 1,648.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.70 : 2,880.25 = 1,098.68 : x
  2. Step 2: Convert to fraction form
    1,919.70/2,880.25 = 1,098.68/x
  3. Step 3: Cross multiply
    1,919.70x = 2,880.25 × 1,098.68
  4. Step 4: Simplify right side
    1,919.70x = 3,164,455.92
  5. Step 5: Solve for x
    x = 3,164,455.92/1,919.70
  6. Step 6: Final answer
    x = 1,648.41

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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.