Home / 1,328,878,814.20-1,993,318,221.30-638,619,623.80

Finding the Fourth Proportional to 1,328,878,814.20, 1,993,318,221.30 and 638,619,623.80

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Solution

The fourth proportional to 1,328,878,814.20, 1,993,318,221.30 and 638,619,623.80 is: 957,929,435.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,878,814.20 : 1,993,318,221.30 = 638,619,623.80 : x
  2. Step 2: Convert to fraction form
    1,328,878,814.20/1,993,318,221.30 = 638,619,623.80/x
  3. Step 3: Cross multiply
    1,328,878,814.20x = 1,993,318,221.30 × 638,619,623.80
  4. Step 4: Simplify right side
    1,328,878,814.20x = 1,272,972,132,600,291,072
  5. Step 5: Solve for x
    x = 1,272,972,132,600,291,072/1,328,878,814.20
  6. Step 6: Final answer
    x = 957,929,435.70

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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.