Home / 1,420,912,505.79-2,131,569,043.74-438,418,928.66

Finding the Fourth Proportional to 1,420,912,505.79, 2,131,569,043.74 and 438,418,928.66

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Solution

The fourth proportional to 1,420,912,505.79, 2,131,569,043.74 and 438,418,928.66 is: 657,690,190.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420,912,505.79 : 2,131,569,043.74 = 438,418,928.66 : x
  2. Step 2: Convert to fraction form
    1,420,912,505.79/2,131,569,043.74 = 438,418,928.66/x
  3. Step 3: Cross multiply
    1,420,912,505.79x = 2,131,569,043.74 × 438,418,928.66
  4. Step 4: Simplify right side
    1,420,912,505.79x = 934,520,216,510,653,568
  5. Step 5: Solve for x
    x = 934,520,216,510,653,568/1,420,912,505.79
  6. Step 6: Final answer
    x = 657,690,190.43

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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.