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Finding the Fourth Proportional to 744.95, 1,028.73 and 479.85

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Solution

The fourth proportional to 744.95, 1,028.73 and 479.85 is: 662.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.95 : 1,028.73 = 479.85 : x
  2. Step 2: Convert to fraction form
    744.95/1,028.73 = 479.85/x
  3. Step 3: Cross multiply
    744.95x = 1,028.73 × 479.85
  4. Step 4: Simplify right side
    744.95x = 493,636.09
  5. Step 5: Solve for x
    x = 493,636.09/744.95
  6. Step 6: Final answer
    x = 662.64

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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.