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Finding the Fourth Proportional to 2,858.81, 4,284.68 and 1,687.63

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Solution

The fourth proportional to 2,858.81, 4,284.68 and 1,687.63 is: 2,529.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.81 : 4,284.68 = 1,687.63 : x
  2. Step 2: Convert to fraction form
    2,858.81/4,284.68 = 1,687.63/x
  3. Step 3: Cross multiply
    2,858.81x = 4,284.68 × 1,687.63
  4. Step 4: Simplify right side
    2,858.81x = 7,230,933.09
  5. Step 5: Solve for x
    x = 7,230,933.09/2,858.81
  6. Step 6: Final answer
    x = 2,529.35

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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.