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Finding the Fourth Proportional to 318,734.40, 477,410.40 and 263,438.40

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Solution

The fourth proportional to 318,734.40, 477,410.40 and 263,438.40 is: 394,586.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,734.40 : 477,410.40 = 263,438.40 : x
  2. Step 2: Convert to fraction form
    318,734.40/477,410.40 = 263,438.40/x
  3. Step 3: Cross multiply
    318,734.40x = 477,410.40 × 263,438.40
  4. Step 4: Simplify right side
    318,734.40x = 125,768,231,919.36
  5. Step 5: Solve for x
    x = 125,768,231,919.36/318,734.40
  6. Step 6: Final answer
    x = 394,586.31

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1.5x scale

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.