Home / 669,987,191.20-1,005,012,279.60-209,940,368.80

Finding the Fourth Proportional to 669,987,191.20, 1,005,012,279.60 and 209,940,368.80

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Solution

The fourth proportional to 669,987,191.20, 1,005,012,279.60 and 209,940,368.80 is: 314,920,421.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,987,191.20 : 1,005,012,279.60 = 209,940,368.80 : x
  2. Step 2: Convert to fraction form
    669,987,191.20/1,005,012,279.60 = 209,940,368.80/x
  3. Step 3: Cross multiply
    669,987,191.20x = 1,005,012,279.60 × 209,940,368.80
  4. Step 4: Simplify right side
    669,987,191.20x = 210,992,648,627,752,736
  5. Step 5: Solve for x
    x = 210,992,648,627,752,736/669,987,191.20
  6. Step 6: Final answer
    x = 314,920,421.46

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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.