Home / 1,187,172,190.60-1,780,758,341.26-813,311,418.71

Finding the Fourth Proportional to 1,187,172,190.60, 1,780,758,341.26 and 813,311,418.71

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Solution

The fourth proportional to 1,187,172,190.60, 1,780,758,341.26 and 813,311,418.71 is: 1,219,967,165.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,172,190.60 : 1,780,758,341.26 = 813,311,418.71 : x
  2. Step 2: Convert to fraction form
    1,187,172,190.60/1,780,758,341.26 = 813,311,418.71/x
  3. Step 3: Cross multiply
    1,187,172,190.60x = 1,780,758,341.26 × 813,311,418.71
  4. Step 4: Simplify right side
    1,187,172,190.60x = 1,448,311,092,909,837,056
  5. Step 5: Solve for x
    x = 1,448,311,092,909,837,056/1,187,172,190.60
  6. Step 6: Final answer
    x = 1,219,967,165.99

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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.