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Finding the Fourth Proportional to 1,858.46, 2,787.78 and 626.24

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Solution

The fourth proportional to 1,858.46, 2,787.78 and 626.24 is: 939.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,858.46 : 2,787.78 = 626.24 : x
  2. Step 2: Convert to fraction form
    1,858.46/2,787.78 = 626.24/x
  3. Step 3: Cross multiply
    1,858.46x = 2,787.78 × 626.24
  4. Step 4: Simplify right side
    1,858.46x = 1,745,805.41
  5. Step 5: Solve for x
    x = 1,745,805.41/1,858.46
  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.