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Finding the Fourth Proportional to 1,293,757.11, 1,938,490.38 and 786,784.59

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Solution

The fourth proportional to 1,293,757.11, 1,938,490.38 and 786,784.59 is: 1,178,872.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293,757.11 : 1,938,490.38 = 786,784.59 : x
  2. Step 2: Convert to fraction form
    1,293,757.11/1,938,490.38 = 786,784.59/x
  3. Step 3: Cross multiply
    1,293,757.11x = 1,938,490.38 × 786,784.59
  4. Step 4: Simplify right side
    1,293,757.11x = 1,525,174,358,847.24
  5. Step 5: Solve for x
    x = 1,525,174,358,847.24/1,293,757.11
  6. Step 6: Final answer
    x = 1,178,872.25

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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.