Home / 777,412,728.40-1,067,118,940.21-687,333,478.90

Finding the Fourth Proportional to 777,412,728.40, 1,067,118,940.21 and 687,333,478.90

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Solution

The fourth proportional to 777,412,728.40, 1,067,118,940.21 and 687,333,478.90 is: 943,471,269.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,412,728.40 : 1,067,118,940.21 = 687,333,478.90 : x
  2. Step 2: Convert to fraction form
    777,412,728.40/1,067,118,940.21 = 687,333,478.90/x
  3. Step 3: Cross multiply
    777,412,728.40x = 1,067,118,940.21 × 687,333,478.90
  4. Step 4: Simplify right side
    777,412,728.40x = 733,466,573,574,620,416
  5. Step 5: Solve for x
    x = 733,466,573,574,620,416/777,412,728.40
  6. Step 6: Final answer
    x = 943,471,269.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.