Home / 1,187,172,200.75-1,780,758,356.46-813,311,428.86

Finding the Fourth Proportional to 1,187,172,200.75, 1,780,758,356.46 and 813,311,428.86

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Solution

The fourth proportional to 1,187,172,200.75, 1,780,758,356.46 and 813,311,428.86 is: 1,219,967,181.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,172,200.75 : 1,780,758,356.46 = 813,311,428.86 : x
  2. Step 2: Convert to fraction form
    1,187,172,200.75/1,780,758,356.46 = 813,311,428.86/x
  3. Step 3: Cross multiply
    1,187,172,200.75x = 1,780,758,356.46 × 813,311,428.86
  4. Step 4: Simplify right side
    1,187,172,200.75x = 1,448,311,123,351,139,840
  5. Step 5: Solve for x
    x = 1,448,311,123,351,139,840/1,187,172,200.75
  6. Step 6: Final answer
    x = 1,219,967,181.20

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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.