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Finding the Fourth Proportional to 321,401.58, 481,907.91 and 143,875.50

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Solution

The fourth proportional to 321,401.58, 481,907.91 and 143,875.50 is: 215,726.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,401.58 : 481,907.91 = 143,875.50 : x
  2. Step 2: Convert to fraction form
    321,401.58/481,907.91 = 143,875.50/x
  3. Step 3: Cross multiply
    321,401.58x = 481,907.91 × 143,875.50
  4. Step 4: Simplify right side
    321,401.58x = 69,334,741,505.21
  5. Step 5: Solve for x
    x = 69,334,741,505.21/321,401.58
  6. Step 6: Final answer
    x = 215,726.20

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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.