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Finding the Fourth Proportional to 505,215.50, 697,197.45 and 278,861.06

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Solution

The fourth proportional to 505,215.50, 697,197.45 and 278,861.06 is: 384,828.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,215.50 : 697,197.45 = 278,861.06 : x
  2. Step 2: Convert to fraction form
    505,215.50/697,197.45 = 278,861.06/x
  3. Step 3: Cross multiply
    505,215.50x = 697,197.45 × 278,861.06
  4. Step 4: Simplify right side
    505,215.50x = 194,421,219,936.30
  5. Step 5: Solve for x
    x = 194,421,219,936.30/505,215.50
  6. Step 6: Final answer
    x = 384,828.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.