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Finding the Fourth Proportional to 326,817.70, 490,400.70 and 127,144.60

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Solution

The fourth proportional to 326,817.70, 490,400.70 and 127,144.60 is: 190,784.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,817.70 : 490,400.70 = 127,144.60 : x
  2. Step 2: Convert to fraction form
    326,817.70/490,400.70 = 127,144.60/x
  3. Step 3: Cross multiply
    326,817.70x = 490,400.70 × 127,144.60
  4. Step 4: Simplify right side
    326,817.70x = 62,351,800,841.22
  5. Step 5: Solve for x
    x = 62,351,800,841.22/326,817.70
  6. Step 6: Final answer
    x = 190,784.65

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1.5x scale

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.