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Finding the Fourth Proportional to 2,858.76, 4,288.14 and 1,759.80

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Solution

The fourth proportional to 2,858.76, 4,288.14 and 1,759.80 is: 2,639.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.76 : 4,288.14 = 1,759.80 : x
  2. Step 2: Convert to fraction form
    2,858.76/4,288.14 = 1,759.80/x
  3. Step 3: Cross multiply
    2,858.76x = 4,288.14 × 1,759.80
  4. Step 4: Simplify right side
    2,858.76x = 7,546,268.77
  5. Step 5: Solve for x
    x = 7,546,268.77/2,858.76
  6. Step 6: Final answer
    x = 2,639.70

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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.