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Finding the Fourth Proportional to 1,277,686, 1,916,853 and 478,969.84

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Solution

The fourth proportional to 1,277,686, 1,916,853 and 478,969.84 is: 718,576.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277,686 : 1,916,853 = 478,969.84 : x
  2. Step 2: Convert to fraction form
    1,277,686/1,916,853 = 478,969.84/x
  3. Step 3: Cross multiply
    1,277,686x = 1,916,853 × 478,969.84
  4. Step 4: Simplify right side
    1,277,686x = 918,114,774,713.52
  5. Step 5: Solve for x
    x = 918,114,774,713.52/1,277,686
  6. Step 6: Final answer
    x = 718,576.22

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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.