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Finding the Fourth Proportional to 1,919.42, 2,880.08 and 878.93

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Solution

The fourth proportional to 1,919.42, 2,880.08 and 878.93 is: 1,318.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.42 : 2,880.08 = 878.93 : x
  2. Step 2: Convert to fraction form
    1,919.42/2,880.08 = 878.93/x
  3. Step 3: Cross multiply
    1,919.42x = 2,880.08 × 878.93
  4. Step 4: Simplify right side
    1,919.42x = 2,531,378.39
  5. Step 5: Solve for x
    x = 2,531,378.39/1,919.42
  6. Step 6: Final answer
    x = 1,318.82

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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.