Home / 669,987,205.70-1,005,012,301.35-209,940,383.30

Finding the Fourth Proportional to 669,987,205.70, 1,005,012,301.35 and 209,940,383.30

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Solution

The fourth proportional to 669,987,205.70, 1,005,012,301.35 and 209,940,383.30 is: 314,920,443.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,987,205.70 : 1,005,012,301.35 = 209,940,383.30 : x
  2. Step 2: Convert to fraction form
    669,987,205.70/1,005,012,301.35 = 209,940,383.30/x
  3. Step 3: Cross multiply
    669,987,205.70x = 1,005,012,301.35 × 209,940,383.30
  4. Step 4: Simplify right side
    669,987,205.70x = 210,992,667,766,634,112
  5. Step 5: Solve for x
    x = 210,992,667,766,634,112/669,987,205.70
  6. Step 6: Final answer
    x = 314,920,443.21

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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.