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Finding the Fourth Proportional to 623.23, 859.44 and 490.22

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Solution

The fourth proportional to 623.23, 859.44 and 490.22 is: 676.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.23 : 859.44 = 490.22 : x
  2. Step 2: Convert to fraction form
    623.23/859.44 = 490.22/x
  3. Step 3: Cross multiply
    623.23x = 859.44 × 490.22
  4. Step 4: Simplify right side
    623.23x = 421,315.44
  5. Step 5: Solve for x
    x = 421,315.44/623.23
  6. Step 6: Final answer
    x = 676.02

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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.