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Finding the Fourth Proportional to 291,456.50, 437,202.30 and 91,783.40

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Solution

The fourth proportional to 291,456.50, 437,202.30 and 91,783.40 is: 137,680.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,456.50 : 437,202.30 = 91,783.40 : x
  2. Step 2: Convert to fraction form
    291,456.50/437,202.30 = 91,783.40/x
  3. Step 3: Cross multiply
    291,456.50x = 437,202.30 × 91,783.40
  4. Step 4: Simplify right side
    291,456.50x = 40,127,913,581.82
  5. Step 5: Solve for x
    x = 40,127,913,581.82/291,456.50
  6. Step 6: Final answer
    x = 137,680.63

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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.