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Finding the Fourth Proportional to 623.77, 936.87 and 485.26

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Solution

The fourth proportional to 623.77, 936.87 and 485.26 is: 728.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.77 : 936.87 = 485.26 : x
  2. Step 2: Convert to fraction form
    623.77/936.87 = 485.26/x
  3. Step 3: Cross multiply
    623.77x = 936.87 × 485.26
  4. Step 4: Simplify right side
    623.77x = 454,625.54
  5. Step 5: Solve for x
    x = 454,625.54/623.77
  6. Step 6: Final answer
    x = 728.84

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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.