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Finding the Fourth Proportional to 1,897,978.70, 2,619,210.60 and 1,038,538.96

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Solution

The fourth proportional to 1,897,978.70, 2,619,210.60 and 1,038,538.96 is: 1,433,183.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,897,978.70 : 2,619,210.60 = 1,038,538.96 : x
  2. Step 2: Convert to fraction form
    1,897,978.70/2,619,210.60 = 1,038,538.96/x
  3. Step 3: Cross multiply
    1,897,978.70x = 2,619,210.60 × 1,038,538.96
  4. Step 4: Simplify right side
    1,897,978.70x = 2,720,152,252,544.98
  5. Step 5: Solve for x
    x = 2,720,152,252,544.98/1,897,978.70
  6. Step 6: Final answer
    x = 1,433,183.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.