Home / 1,187,172,190.10-1,780,758,340.51-813,311,418.21

Finding the Fourth Proportional to 1,187,172,190.10, 1,780,758,340.51 and 813,311,418.21

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Solution

The fourth proportional to 1,187,172,190.10, 1,780,758,340.51 and 813,311,418.21 is: 1,219,967,165.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,172,190.10 : 1,780,758,340.51 = 813,311,418.21 : x
  2. Step 2: Convert to fraction form
    1,187,172,190.10/1,780,758,340.51 = 813,311,418.21/x
  3. Step 3: Cross multiply
    1,187,172,190.10x = 1,780,758,340.51 × 813,311,418.21
  4. Step 4: Simplify right side
    1,187,172,190.10x = 1,448,311,091,409,474,304
  5. Step 5: Solve for x
    x = 1,448,311,091,409,474,304/1,187,172,190.10
  6. Step 6: Final answer
    x = 1,219,967,165.24

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1.5x scale

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.