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Finding the Fourth Proportional to 1,199,845,839.47, 1,797,803,385.87 and 639,012,223.25

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Solution

The fourth proportional to 1,199,845,839.47, 1,797,803,385.87 and 639,012,223.25 is: 957,471,619.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199,845,839.47 : 1,797,803,385.87 = 639,012,223.25 : x
  2. Step 2: Convert to fraction form
    1,199,845,839.47/1,797,803,385.87 = 639,012,223.25/x
  3. Step 3: Cross multiply
    1,199,845,839.47x = 1,797,803,385.87 × 639,012,223.25
  4. Step 4: Simplify right side
    1,199,845,839.47x = 1,148,818,338,562,177,280
  5. Step 5: Solve for x
    x = 1,148,818,338,562,177,280/1,199,845,839.47
  6. Step 6: Final answer
    x = 957,471,619.08

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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.