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Finding the Fourth Proportional to 555,440.21, 766,290.49 and 322,828.50

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Solution

The fourth proportional to 555,440.21, 766,290.49 and 322,828.50 is: 445,377.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,440.21 : 766,290.49 = 322,828.50 : x
  2. Step 2: Convert to fraction form
    555,440.21/766,290.49 = 322,828.50/x
  3. Step 3: Cross multiply
    555,440.21x = 766,290.49 × 322,828.50
  4. Step 4: Simplify right side
    555,440.21x = 247,380,409,450.97
  5. Step 5: Solve for x
    x = 247,380,409,450.97/555,440.21
  6. Step 6: Final answer
    x = 445,377.21

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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.