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Finding the Fourth Proportional to 1,858.02, 2,786.94 and 626.28

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Solution

The fourth proportional to 1,858.02, 2,786.94 and 626.28 is: 939.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,858.02 : 2,786.94 = 626.28 : x
  2. Step 2: Convert to fraction form
    1,858.02/2,786.94 = 626.28/x
  3. Step 3: Cross multiply
    1,858.02x = 2,786.94 × 626.28
  4. Step 4: Simplify right side
    1,858.02x = 1,745,404.78
  5. Step 5: Solve for x
    x = 1,745,404.78/1,858.02
  6. Step 6: Final answer
    x = 939.39

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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.