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Finding the Fourth Proportional to 308,976.80, 433,189.60 and 308,976.80

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Solution

The fourth proportional to 308,976.80, 433,189.60 and 308,976.80 is: 433,189.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,976.80 : 433,189.60 = 308,976.80 : x
  2. Step 2: Convert to fraction form
    308,976.80/433,189.60 = 308,976.80/x
  3. Step 3: Cross multiply
    308,976.80x = 433,189.60 × 308,976.80
  4. Step 4: Simplify right side
    308,976.80x = 133,845,536,401.28
  5. Step 5: Solve for x
    x = 133,845,536,401.28/308,976.80
  6. Step 6: Final answer
    x = 433,189.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.