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Finding the Fourth Proportional to 2,838.87, 4,259.07 and 990.09

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Solution

The fourth proportional to 2,838.87, 4,259.07 and 990.09 is: 1,485.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,838.87 : 4,259.07 = 990.09 : x
  2. Step 2: Convert to fraction form
    2,838.87/4,259.07 = 990.09/x
  3. Step 3: Cross multiply
    2,838.87x = 4,259.07 × 990.09
  4. Step 4: Simplify right side
    2,838.87x = 4,216,862.62
  5. Step 5: Solve for x
    x = 4,216,862.62/2,838.87
  6. Step 6: Final answer
    x = 1,485.40

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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.