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Finding the Fourth Proportional to 351,421.80, 525,903.90 and 321,930.60

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Solution

The fourth proportional to 351,421.80, 525,903.90 and 321,930.60 is: 481,770.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,421.80 : 525,903.90 = 321,930.60 : x
  2. Step 2: Convert to fraction form
    351,421.80/525,903.90 = 321,930.60/x
  3. Step 3: Cross multiply
    351,421.80x = 525,903.90 × 321,930.60
  4. Step 4: Simplify right side
    351,421.80x = 169,304,558,069.34
  5. Step 5: Solve for x
    x = 169,304,558,069.34/351,421.80
  6. Step 6: Final answer
    x = 481,770.22

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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.