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Finding the Fourth Proportional to 321,330.40, 481,995.60 and 121,657.30

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Solution

The fourth proportional to 321,330.40, 481,995.60 and 121,657.30 is: 182,485.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,330.40 : 481,995.60 = 121,657.30 : x
  2. Step 2: Convert to fraction form
    321,330.40/481,995.60 = 121,657.30/x
  3. Step 3: Cross multiply
    321,330.40x = 481,995.60 × 121,657.30
  4. Step 4: Simplify right side
    321,330.40x = 58,638,283,307.88
  5. Step 5: Solve for x
    x = 58,638,283,307.88/321,330.40
  6. Step 6: Final answer
    x = 182,485.95

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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.