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Finding the Fourth Proportional to 3,066,978.19, 4,600,515 and 908,221.68

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Solution

The fourth proportional to 3,066,978.19, 4,600,515 and 908,221.68 is: 1,362,346.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,066,978.19 : 4,600,515 = 908,221.68 : x
  2. Step 2: Convert to fraction form
    3,066,978.19/4,600,515 = 908,221.68/x
  3. Step 3: Cross multiply
    3,066,978.19x = 4,600,515 × 908,221.68
  4. Step 4: Simplify right side
    3,066,978.19x = 4,178,287,462,165.20
  5. Step 5: Solve for x
    x = 4,178,287,462,165.20/3,066,978.19
  6. Step 6: Final answer
    x = 1,362,346.65

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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.