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Finding the Fourth Proportional to 1,199,555,907.17, 1,655,378,118.57 and 670,919,919.20

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Solution

The fourth proportional to 1,199,555,907.17, 1,655,378,118.57 and 670,919,919.20 is: 925,864,436.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199,555,907.17 : 1,655,378,118.57 = 670,919,919.20 : x
  2. Step 2: Convert to fraction form
    1,199,555,907.17/1,655,378,118.57 = 670,919,919.20/x
  3. Step 3: Cross multiply
    1,199,555,907.17x = 1,655,378,118.57 × 670,919,919.20
  4. Step 4: Simplify right side
    1,199,555,907.17x = 1,110,626,153,548,155,520
  5. Step 5: Solve for x
    x = 1,110,626,153,548,155,520/1,199,555,907.17
  6. Step 6: Final answer
    x = 925,864,436.09

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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.