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Finding the Fourth Proportional to 623.82, 860.40 and 427.44

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Solution

The fourth proportional to 623.82, 860.40 and 427.44 is: 589.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.82 : 860.40 = 427.44 : x
  2. Step 2: Convert to fraction form
    623.82/860.40 = 427.44/x
  3. Step 3: Cross multiply
    623.82x = 860.40 × 427.44
  4. Step 4: Simplify right side
    623.82x = 367,769.38
  5. Step 5: Solve for x
    x = 367,769.38/623.82
  6. Step 6: Final answer
    x = 589.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.