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Finding the Fourth Proportional to 1,277,336.05, 1,913,835.12 and 770,832.72

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Solution

The fourth proportional to 1,277,336.05, 1,913,835.12 and 770,832.72 is: 1,154,940.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277,336.05 : 1,913,835.12 = 770,832.72 : x
  2. Step 2: Convert to fraction form
    1,277,336.05/1,913,835.12 = 770,832.72/x
  3. Step 3: Cross multiply
    1,277,336.05x = 1,913,835.12 × 770,832.72
  4. Step 4: Simplify right side
    1,277,336.05x = 1,475,246,741,248.63
  5. Step 5: Solve for x
    x = 1,475,246,741,248.63/1,277,336.05
  6. Step 6: Final answer
    x = 1,154,940.19

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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.