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Finding the Fourth Proportional to 505,279.26, 697,311.72 and 290,491.56

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Solution

The fourth proportional to 505,279.26, 697,311.72 and 290,491.56 is: 400,893.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,279.26 : 697,311.72 = 290,491.56 : x
  2. Step 2: Convert to fraction form
    505,279.26/697,311.72 = 290,491.56/x
  3. Step 3: Cross multiply
    505,279.26x = 697,311.72 × 290,491.56
  4. Step 4: Simplify right side
    505,279.26x = 202,563,169,349.08
  5. Step 5: Solve for x
    x = 202,563,169,349.08/505,279.26
  6. Step 6: Final answer
    x = 400,893.50

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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.