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Finding the Fourth Proportional to 326,968.80, 490,088.70 and 127,222.80

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Solution

The fourth proportional to 326,968.80, 490,088.70 and 127,222.80 is: 190,692.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,968.80 : 490,088.70 = 127,222.80 : x
  2. Step 2: Convert to fraction form
    326,968.80/490,088.70 = 127,222.80/x
  3. Step 3: Cross multiply
    326,968.80x = 490,088.70 × 127,222.80
  4. Step 4: Simplify right side
    326,968.80x = 62,350,456,662.36
  5. Step 5: Solve for x
    x = 62,350,456,662.36/326,968.80
  6. Step 6: Final answer
    x = 190,692.37

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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.