Home / 811,945.80-1,217,918.70-768,400.20

Finding the Fourth Proportional to 811,945.80, 1,217,918.70 and 768,400.20

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Solution

The fourth proportional to 811,945.80, 1,217,918.70 and 768,400.20 is: 1,152,600.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,945.80 : 1,217,918.70 = 768,400.20 : x
  2. Step 2: Convert to fraction form
    811,945.80/1,217,918.70 = 768,400.20/x
  3. Step 3: Cross multiply
    811,945.80x = 1,217,918.70 × 768,400.20
  4. Step 4: Simplify right side
    811,945.80x = 935,848,972,663.74
  5. Step 5: Solve for x
    x = 935,848,972,663.74/811,945.80
  6. Step 6: Final answer
    x = 1,152,600.30

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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.