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Finding the Fourth Proportional to 1,858.68, 2,787.60 and 626.08

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Solution

The fourth proportional to 1,858.68, 2,787.60 and 626.08 is: 938.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,858.68 : 2,787.60 = 626.08 : x
  2. Step 2: Convert to fraction form
    1,858.68/2,787.60 = 626.08/x
  3. Step 3: Cross multiply
    1,858.68x = 2,787.60 × 626.08
  4. Step 4: Simplify right side
    1,858.68x = 1,745,260.61
  5. Step 5: Solve for x
    x = 1,745,260.61/1,858.68
  6. Step 6: Final answer
    x = 938.98

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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.