Home / 709,978,065.06-979,807,577.13-396,719,883.30

Finding the Fourth Proportional to 709,978,065.06, 979,807,577.13 and 396,719,883.30

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Solution

The fourth proportional to 709,978,065.06, 979,807,577.13 and 396,719,883.30 is: 547,494,587.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,978,065.06 : 979,807,577.13 = 396,719,883.30 : x
  2. Step 2: Convert to fraction form
    709,978,065.06/979,807,577.13 = 396,719,883.30/x
  3. Step 3: Cross multiply
    709,978,065.06x = 979,807,577.13 × 396,719,883.30
  4. Step 4: Simplify right side
    709,978,065.06x = 388,709,147,655,469,376
  5. Step 5: Solve for x
    x = 388,709,147,655,469,376/709,978,065.06
  6. Step 6: Final answer
    x = 547,494,587.21

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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.