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Finding the Fourth Proportional to 290,807.34, 436,211.11 and 91,143.22

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Solution

The fourth proportional to 290,807.34, 436,211.11 and 91,143.22 is: 136,714.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,807.34 : 436,211.11 = 91,143.22 : x
  2. Step 2: Convert to fraction form
    290,807.34/436,211.11 = 91,143.22/x
  3. Step 3: Cross multiply
    290,807.34x = 436,211.11 × 91,143.22
  4. Step 4: Simplify right side
    290,807.34x = 39,757,684,188.58
  5. Step 5: Solve for x
    x = 39,757,684,188.58/290,807.34
  6. Step 6: Final answer
    x = 136,714.86

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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.