Home / 319,198,409.70-440,493,606.36-172,520,693.70

Finding the Fourth Proportional to 319,198,409.70, 440,493,606.36 and 172,520,693.70

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Solution

The fourth proportional to 319,198,409.70, 440,493,606.36 and 172,520,693.70 is: 238,078,449.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,198,409.70 : 440,493,606.36 = 172,520,693.70 : x
  2. Step 2: Convert to fraction form
    319,198,409.70/440,493,606.36 = 172,520,693.70/x
  3. Step 3: Cross multiply
    319,198,409.70x = 440,493,606.36 × 172,520,693.70
  4. Step 4: Simplify right side
    319,198,409.70x = 75,994,262,539,641,936
  5. Step 5: Solve for x
    x = 75,994,262,539,641,936/319,198,409.70
  6. Step 6: Final answer
    x = 238,078,449.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.