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Finding the Fourth Proportional to 1,778,692.96, 2,667,489 and 641,308.78

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Solution

The fourth proportional to 1,778,692.96, 2,667,489 and 641,308.78 is: 961,764.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778,692.96 : 2,667,489 = 641,308.78 : x
  2. Step 2: Convert to fraction form
    1,778,692.96/2,667,489 = 641,308.78/x
  3. Step 3: Cross multiply
    1,778,692.96x = 2,667,489 × 641,308.78
  4. Step 4: Simplify right side
    1,778,692.96x = 1,710,684,116,253.42
  5. Step 5: Solve for x
    x = 1,710,684,116,253.42/1,778,692.96
  6. Step 6: Final answer
    x = 961,764.71

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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.