Home / 1,388,903,428.80-2,091,669,381.32-1,264,928,872.32

Finding the Fourth Proportional to 1,388,903,428.80, 2,091,669,381.32 and 1,264,928,872.32

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Solution

The fourth proportional to 1,388,903,428.80, 2,091,669,381.32 and 1,264,928,872.32 is: 1,904,965,411.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,903,428.80 : 2,091,669,381.32 = 1,264,928,872.32 : x
  2. Step 2: Convert to fraction form
    1,388,903,428.80/2,091,669,381.32 = 1,264,928,872.32/x
  3. Step 3: Cross multiply
    1,388,903,428.80x = 2,091,669,381.32 × 1,264,928,872.32
  4. Step 4: Simplify right side
    1,388,903,428.80x = 2,645,812,991,779,379,200
  5. Step 5: Solve for x
    x = 2,645,812,991,779,379,200/1,388,903,428.80
  6. Step 6: Final answer
    x = 1,904,965,411.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.