Home / 1,187,172,200.32-1,780,758,355.86-813,311,428.44

Finding the Fourth Proportional to 1,187,172,200.32, 1,780,758,355.86 and 813,311,428.44

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Solution

The fourth proportional to 1,187,172,200.32, 1,780,758,355.86 and 813,311,428.44 is: 1,219,967,180.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,172,200.32 : 1,780,758,355.86 = 813,311,428.44 : x
  2. Step 2: Convert to fraction form
    1,187,172,200.32/1,780,758,355.86 = 813,311,428.44/x
  3. Step 3: Cross multiply
    1,187,172,200.32x = 1,780,758,355.86 × 813,311,428.44
  4. Step 4: Simplify right side
    1,187,172,200.32x = 1,448,311,122,110,962,432
  5. Step 5: Solve for x
    x = 1,448,311,122,110,962,432/1,187,172,200.32
  6. Step 6: Final answer
    x = 1,219,967,180.60

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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.