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Finding the Fourth Proportional to 654,428.80, 981,448.80 and 254,839.60

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Solution

The fourth proportional to 654,428.80, 981,448.80 and 254,839.60 is: 382,183.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,428.80 : 981,448.80 = 254,839.60 : x
  2. Step 2: Convert to fraction form
    654,428.80/981,448.80 = 254,839.60/x
  3. Step 3: Cross multiply
    654,428.80x = 981,448.80 × 254,839.60
  4. Step 4: Simplify right side
    654,428.80x = 250,112,019,612.48
  5. Step 5: Solve for x
    x = 250,112,019,612.48/654,428.80
  6. Step 6: Final answer
    x = 382,183.70

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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.