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Finding the Fourth Proportional to 1,290,917.81, 1,934,605.23 and 816,754.34

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Solution

The fourth proportional to 1,290,917.81, 1,934,605.23 and 816,754.34 is: 1,224,010.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,917.81 : 1,934,605.23 = 816,754.34 : x
  2. Step 2: Convert to fraction form
    1,290,917.81/1,934,605.23 = 816,754.34/x
  3. Step 3: Cross multiply
    1,290,917.81x = 1,934,605.23 × 816,754.34
  4. Step 4: Simplify right side
    1,290,917.81x = 1,580,097,208,116.17
  5. Step 5: Solve for x
    x = 1,580,097,208,116.17/1,290,917.81
  6. Step 6: Final answer
    x = 1,224,010.70

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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.