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Finding the Fourth Proportional to 505,780.57, 697,956.55 and 276,345.81

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Solution

The fourth proportional to 505,780.57, 697,956.55 and 276,345.81 is: 381,345.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,780.57 : 697,956.55 = 276,345.81 : x
  2. Step 2: Convert to fraction form
    505,780.57/697,956.55 = 276,345.81/x
  3. Step 3: Cross multiply
    505,780.57x = 697,956.55 × 276,345.81
  4. Step 4: Simplify right side
    505,780.57x = 192,877,367,463.69
  5. Step 5: Solve for x
    x = 192,877,367,463.69/505,780.57
  6. Step 6: Final answer
    x = 381,345.94

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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.