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Finding the Fourth Proportional to 903.26, 1,356.44 and 486.54

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Solution

The fourth proportional to 903.26, 1,356.44 and 486.54 is: 730.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.26 : 1,356.44 = 486.54 : x
  2. Step 2: Convert to fraction form
    903.26/1,356.44 = 486.54/x
  3. Step 3: Cross multiply
    903.26x = 1,356.44 × 486.54
  4. Step 4: Simplify right side
    903.26x = 659,959.88
  5. Step 5: Solve for x
    x = 659,959.88/903.26
  6. Step 6: Final answer
    x = 730.64

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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.