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Finding the Fourth Proportional to 623.26, 859.44 and 401.77

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Solution

The fourth proportional to 623.26, 859.44 and 401.77 is: 554.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.26 : 859.44 = 401.77 : x
  2. Step 2: Convert to fraction form
    623.26/859.44 = 401.77/x
  3. Step 3: Cross multiply
    623.26x = 859.44 × 401.77
  4. Step 4: Simplify right side
    623.26x = 345,297.21
  5. Step 5: Solve for x
    x = 345,297.21/623.26
  6. Step 6: Final answer
    x = 554.02

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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.