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Finding the Fourth Proportional to 1,318,899.98, 1,977,316.47 and 520,778.94

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Solution

The fourth proportional to 1,318,899.98, 1,977,316.47 and 520,778.94 is: 780,760.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,899.98 : 1,977,316.47 = 520,778.94 : x
  2. Step 2: Convert to fraction form
    1,318,899.98/1,977,316.47 = 520,778.94/x
  3. Step 3: Cross multiply
    1,318,899.98x = 1,977,316.47 × 520,778.94
  4. Step 4: Simplify right side
    1,318,899.98x = 1,029,744,775,291.14
  5. Step 5: Solve for x
    x = 1,029,744,775,291.14/1,318,899.98
  6. Step 6: Final answer
    x = 780,760.33

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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.