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Finding the Fourth Proportional to 1,518.25, 2,277.39 and 478.23

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Solution

The fourth proportional to 1,518.25, 2,277.39 and 478.23 is: 717.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,518.25 : 2,277.39 = 478.23 : x
  2. Step 2: Convert to fraction form
    1,518.25/2,277.39 = 478.23/x
  3. Step 3: Cross multiply
    1,518.25x = 2,277.39 × 478.23
  4. Step 4: Simplify right side
    1,518.25x = 1,089,105.89
  5. Step 5: Solve for x
    x = 1,089,105.89/1,518.25
  6. Step 6: Final answer
    x = 717.34

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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.