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Finding the Fourth Proportional to 623.44, 860.70 and 427.24

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Solution

The fourth proportional to 623.44, 860.70 and 427.24 is: 589.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.44 : 860.70 = 427.24 : x
  2. Step 2: Convert to fraction form
    623.44/860.70 = 427.24/x
  3. Step 3: Cross multiply
    623.44x = 860.70 × 427.24
  4. Step 4: Simplify right side
    623.44x = 367,725.47
  5. Step 5: Solve for x
    x = 367,725.47/623.44
  6. Step 6: Final answer
    x = 589.83

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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.