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Finding the Fourth Proportional to 903.24, 1,353.81 and 415.26

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Solution

The fourth proportional to 903.24, 1,353.81 and 415.26 is: 622.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.24 : 1,353.81 = 415.26 : x
  2. Step 2: Convert to fraction form
    903.24/1,353.81 = 415.26/x
  3. Step 3: Cross multiply
    903.24x = 1,353.81 × 415.26
  4. Step 4: Simplify right side
    903.24x = 562,183.14
  5. Step 5: Solve for x
    x = 562,183.14/903.24
  6. Step 6: Final answer
    x = 622.41

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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.