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Finding the Fourth Proportional to 1,855.74, 2,783.69 and 623.19

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Solution

The fourth proportional to 1,855.74, 2,783.69 and 623.19 is: 934.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,855.74 : 2,783.69 = 623.19 : x
  2. Step 2: Convert to fraction form
    1,855.74/2,783.69 = 623.19/x
  3. Step 3: Cross multiply
    1,855.74x = 2,783.69 × 623.19
  4. Step 4: Simplify right side
    1,855.74x = 1,734,764.66
  5. Step 5: Solve for x
    x = 1,734,764.66/1,855.74
  6. Step 6: Final answer
    x = 934.81

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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.