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Finding the Fourth Proportional to 2,919.07, 4,378.59 and 867.07

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Solution

The fourth proportional to 2,919.07, 4,378.59 and 867.07 is: 1,300.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,919.07 : 4,378.59 = 867.07 : x
  2. Step 2: Convert to fraction form
    2,919.07/4,378.59 = 867.07/x
  3. Step 3: Cross multiply
    2,919.07x = 4,378.59 × 867.07
  4. Step 4: Simplify right side
    2,919.07x = 3,796,544.03
  5. Step 5: Solve for x
    x = 3,796,544.03/2,919.07
  6. Step 6: Final answer
    x = 1,300.60

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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.