Home / 1,420,193,872.80-2,128,947,116.40-838,374,890.40

Finding the Fourth Proportional to 1,420,193,872.80, 2,128,947,116.40 and 838,374,890.40

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Solution

The fourth proportional to 1,420,193,872.80, 2,128,947,116.40 and 838,374,890.40 is: 1,256,769,121.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420,193,872.80 : 2,128,947,116.40 = 838,374,890.40 : x
  2. Step 2: Convert to fraction form
    1,420,193,872.80/2,128,947,116.40 = 838,374,890.40/x
  3. Step 3: Cross multiply
    1,420,193,872.80x = 2,128,947,116.40 × 838,374,890.40
  4. Step 4: Simplify right side
    1,420,193,872.80x = 1,784,855,805,379,246,080
  5. Step 5: Solve for x
    x = 1,784,855,805,379,246,080/1,420,193,872.80
  6. Step 6: Final answer
    x = 1,256,769,121.15

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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.