Home / 648,238,085.21-972,511,817.72-211,539,581.86

Finding the Fourth Proportional to 648,238,085.21, 972,511,817.72 and 211,539,581.86

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Solution

The fourth proportional to 648,238,085.21, 972,511,817.72 and 211,539,581.86 is: 317,359,852.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,238,085.21 : 972,511,817.72 = 211,539,581.86 : x
  2. Step 2: Convert to fraction form
    648,238,085.21/972,511,817.72 = 211,539,581.86/x
  3. Step 3: Cross multiply
    648,238,085.21x = 972,511,817.72 × 211,539,581.86
  4. Step 4: Simplify right side
    648,238,085.21x = 205,724,743,274,397,344
  5. Step 5: Solve for x
    x = 205,724,743,274,397,344/648,238,085.21
  6. Step 6: Final answer
    x = 317,359,852.76

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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.