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Finding the Fourth Proportional to 318,504.40, 477,065.40 and 263,208.40

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Solution

The fourth proportional to 318,504.40, 477,065.40 and 263,208.40 is: 394,241.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,504.40 : 477,065.40 = 263,208.40 : x
  2. Step 2: Convert to fraction form
    318,504.40/477,065.40 = 263,208.40/x
  3. Step 3: Cross multiply
    318,504.40x = 477,065.40 × 263,208.40
  4. Step 4: Simplify right side
    318,504.40x = 125,567,620,629.36
  5. Step 5: Solve for x
    x = 125,567,620,629.36/318,504.40
  6. Step 6: Final answer
    x = 394,241.40

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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.