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Finding the Fourth Proportional to 405,616.80, 608,425.20 and 263,899.20

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Solution

The fourth proportional to 405,616.80, 608,425.20 and 263,899.20 is: 395,848.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,616.80 : 608,425.20 = 263,899.20 : x
  2. Step 2: Convert to fraction form
    405,616.80/608,425.20 = 263,899.20/x
  3. Step 3: Cross multiply
    405,616.80x = 608,425.20 × 263,899.20
  4. Step 4: Simplify right side
    405,616.80x = 160,562,923,539.84
  5. Step 5: Solve for x
    x = 160,562,923,539.84/405,616.80
  6. Step 6: Final answer
    x = 395,848.80

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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.