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Finding the Fourth Proportional to 321,366.40, 482,126.40 and 163,619.20

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Solution

The fourth proportional to 321,366.40, 482,126.40 and 163,619.20 is: 245,467.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,366.40 : 482,126.40 = 163,619.20 : x
  2. Step 2: Convert to fraction form
    321,366.40/482,126.40 = 163,619.20/x
  3. Step 3: Cross multiply
    321,366.40x = 482,126.40 × 163,619.20
  4. Step 4: Simplify right side
    321,366.40x = 78,885,135,866.88
  5. Step 5: Solve for x
    x = 78,885,135,866.88/321,366.40
  6. Step 6: Final answer
    x = 245,467.90

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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.