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Finding the Fourth Proportional to 619,805.24, 855,835.40 and 505,100.76

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Solution

The fourth proportional to 619,805.24, 855,835.40 and 505,100.76 is: 697,449.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,805.24 : 855,835.40 = 505,100.76 : x
  2. Step 2: Convert to fraction form
    619,805.24/855,835.40 = 505,100.76/x
  3. Step 3: Cross multiply
    619,805.24x = 855,835.40 × 505,100.76
  4. Step 4: Simplify right side
    619,805.24x = 432,283,110,974.90
  5. Step 5: Solve for x
    x = 432,283,110,974.90/619,805.24
  6. Step 6: Final answer
    x = 697,449.91

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Double scale
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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.