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Finding the Fourth Proportional to 919,329,707.90, 1,378,994,561.85 and 804,538,451.90

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Solution

The fourth proportional to 919,329,707.90, 1,378,994,561.85 and 804,538,451.90 is: 1,206,807,677.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,329,707.90 : 1,378,994,561.85 = 804,538,451.90 : x
  2. Step 2: Convert to fraction form
    919,329,707.90/1,378,994,561.85 = 804,538,451.90/x
  3. Step 3: Cross multiply
    919,329,707.90x = 1,378,994,561.85 × 804,538,451.90
  4. Step 4: Simplify right side
    919,329,707.90x = 1,109,454,149,969,317,632
  5. Step 5: Solve for x
    x = 1,109,454,149,969,317,632/919,329,707.90
  6. Step 6: Final answer
    x = 1,206,807,677.85

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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.