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Finding the Fourth Proportional to 321,164.40, 481,746.60 and 215,410.80

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Solution

The fourth proportional to 321,164.40, 481,746.60 and 215,410.80 is: 323,116.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,164.40 : 481,746.60 = 215,410.80 : x
  2. Step 2: Convert to fraction form
    321,164.40/481,746.60 = 215,410.80/x
  3. Step 3: Cross multiply
    321,164.40x = 481,746.60 × 215,410.80
  4. Step 4: Simplify right side
    321,164.40x = 103,773,420,503.28
  5. Step 5: Solve for x
    x = 103,773,420,503.28/321,164.40
  6. Step 6: Final answer
    x = 323,116.20

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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.