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Finding the Fourth Proportional to 405,399.72, 605,130.99 and 357,517.80

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Solution

The fourth proportional to 405,399.72, 605,130.99 and 357,517.80 is: 533,658.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,399.72 : 605,130.99 = 357,517.80 : x
  2. Step 2: Convert to fraction form
    405,399.72/605,130.99 = 357,517.80/x
  3. Step 3: Cross multiply
    405,399.72x = 605,130.99 × 357,517.80
  4. Step 4: Simplify right side
    405,399.72x = 216,345,100,256.62
  5. Step 5: Solve for x
    x = 216,345,100,256.62/405,399.72
  6. Step 6: Final answer
    x = 533,658.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.