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Finding the Fourth Proportional to 405,197.80, 606,921.90 and 263,480.20

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Solution

The fourth proportional to 405,197.80, 606,921.90 and 263,480.20 is: 394,651.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,197.80 : 606,921.90 = 263,480.20 : x
  2. Step 2: Convert to fraction form
    405,197.80/606,921.90 = 263,480.20/x
  3. Step 3: Cross multiply
    405,197.80x = 606,921.90 × 263,480.20
  4. Step 4: Simplify right side
    405,197.80x = 159,911,903,596.38
  5. Step 5: Solve for x
    x = 159,911,903,596.38/405,197.80
  6. Step 6: Final answer
    x = 394,651.46

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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.