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Finding the Fourth Proportional to 1,956,509.56, 2,698,839.30 and 1,230,207.40

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Solution

The fourth proportional to 1,956,509.56, 2,698,839.30 and 1,230,207.40 is: 1,696,966.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,956,509.56 : 2,698,839.30 = 1,230,207.40 : x
  2. Step 2: Convert to fraction form
    1,956,509.56/2,698,839.30 = 1,230,207.40/x
  3. Step 3: Cross multiply
    1,956,509.56x = 2,698,839.30 × 1,230,207.40
  4. Step 4: Simplify right side
    1,956,509.56x = 3,320,132,078,270.82
  5. Step 5: Solve for x
    x = 3,320,132,078,270.82/1,956,509.56
  6. Step 6: Final answer
    x = 1,696,966.96

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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.