Home / 678,789,636.21-1,017,635,243.26-212,211,010.26

Finding the Fourth Proportional to 678,789,636.21, 1,017,635,243.26 and 212,211,010.26

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Solution

The fourth proportional to 678,789,636.21, 1,017,635,243.26 and 212,211,010.26 is: 318,144,814.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,789,636.21 : 1,017,635,243.26 = 212,211,010.26 : x
  2. Step 2: Convert to fraction form
    678,789,636.21/1,017,635,243.26 = 212,211,010.26/x
  3. Step 3: Cross multiply
    678,789,636.21x = 1,017,635,243.26 × 212,211,010.26
  4. Step 4: Simplify right side
    678,789,636.21x = 215,953,403,047,854,944
  5. Step 5: Solve for x
    x = 215,953,403,047,854,944/678,789,636.21
  6. Step 6: Final answer
    x = 318,144,814.72

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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.