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Finding the Fourth Proportional to 405,662.80, 607,327.80 and 393,998.80

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Solution

The fourth proportional to 405,662.80, 607,327.80 and 393,998.80 is: 589,865.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,662.80 : 607,327.80 = 393,998.80 : x
  2. Step 2: Convert to fraction form
    405,662.80/607,327.80 = 393,998.80/x
  3. Step 3: Cross multiply
    405,662.80x = 607,327.80 × 393,998.80
  4. Step 4: Simplify right side
    405,662.80x = 239,286,424,406.64
  5. Step 5: Solve for x
    x = 239,286,424,406.64/405,662.80
  6. Step 6: Final answer
    x = 589,865.34

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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.