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Finding the Fourth Proportional to 338,988.16, 469,946.88 and 321,012.64

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Solution

The fourth proportional to 338,988.16, 469,946.88 and 321,012.64 is: 445,027.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,988.16 : 469,946.88 = 321,012.64 : x
  2. Step 2: Convert to fraction form
    338,988.16/469,946.88 = 321,012.64/x
  3. Step 3: Cross multiply
    338,988.16x = 469,946.88 × 321,012.64
  4. Step 4: Simplify right side
    338,988.16x = 150,858,888,608.56
  5. Step 5: Solve for x
    x = 150,858,888,608.56/338,988.16
  6. Step 6: Final answer
    x = 445,027.01

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.