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Finding the Fourth Proportional to 351,428.80, 525,914.40 and 321,937.60

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Solution

The fourth proportional to 351,428.80, 525,914.40 and 321,937.60 is: 481,780.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,428.80 : 525,914.40 = 321,937.60 : x
  2. Step 2: Convert to fraction form
    351,428.80/525,914.40 = 321,937.60/x
  3. Step 3: Cross multiply
    351,428.80x = 525,914.40 × 321,937.60
  4. Step 4: Simplify right side
    351,428.80x = 169,311,619,741.44
  5. Step 5: Solve for x
    x = 169,311,619,741.44/351,428.80
  6. Step 6: Final answer
    x = 481,780.72

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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.