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Finding the Fourth Proportional to 291,918.30, 436,905.45 and 211,728.30

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Solution

The fourth proportional to 291,918.30, 436,905.45 and 211,728.30 is: 316,887.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,918.30 : 436,905.45 = 211,728.30 : x
  2. Step 2: Convert to fraction form
    291,918.30/436,905.45 = 211,728.30/x
  3. Step 3: Cross multiply
    291,918.30x = 436,905.45 × 211,728.30
  4. Step 4: Simplify right side
    291,918.30x = 92,505,248,189.24
  5. Step 5: Solve for x
    x = 92,505,248,189.24/291,918.30
  6. Step 6: Final answer
    x = 316,887.46

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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.