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Finding the Fourth Proportional to 193,986.90, 290,980.35 and 154,620.90

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Solution

The fourth proportional to 193,986.90, 290,980.35 and 154,620.90 is: 231,931.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,986.90 : 290,980.35 = 154,620.90 : x
  2. Step 2: Convert to fraction form
    193,986.90/290,980.35 = 154,620.90/x
  3. Step 3: Cross multiply
    193,986.90x = 290,980.35 × 154,620.90
  4. Step 4: Simplify right side
    193,986.90x = 44,991,643,599.32
  5. Step 5: Solve for x
    x = 44,991,643,599.32/193,986.90
  6. Step 6: Final answer
    x = 231,931.35

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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.