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Finding the Fourth Proportional to 405,938.90, 608,895.80 and 192,860.20

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Solution

The fourth proportional to 405,938.90, 608,895.80 and 192,860.20 is: 289,284.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,938.90 : 608,895.80 = 192,860.20 : x
  2. Step 2: Convert to fraction form
    405,938.90/608,895.80 = 192,860.20/x
  3. Step 3: Cross multiply
    405,938.90x = 608,895.80 × 192,860.20
  4. Step 4: Simplify right side
    405,938.90x = 117,431,765,767.16
  5. Step 5: Solve for x
    x = 117,431,765,767.16/405,938.90
  6. Step 6: Final answer
    x = 289,284.34

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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.