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Finding the Fourth Proportional to 555,438.21, 766,287.73 and 322,826.50

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Solution

The fourth proportional to 555,438.21, 766,287.73 and 322,826.50 is: 445,374.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,438.21 : 766,287.73 = 322,826.50 : x
  2. Step 2: Convert to fraction form
    555,438.21/766,287.73 = 322,826.50/x
  3. Step 3: Cross multiply
    555,438.21x = 766,287.73 × 322,826.50
  4. Step 4: Simplify right side
    555,438.21x = 247,377,987,230.24
  5. Step 5: Solve for x
    x = 247,377,987,230.24/555,438.21
  6. Step 6: Final answer
    x = 445,374.45

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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.