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Finding the Fourth Proportional to 388,769.36, 536,491.56 and 218,993.36

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Solution

The fourth proportional to 388,769.36, 536,491.56 and 218,993.36 is: 302,205.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,769.36 : 536,491.56 = 218,993.36 : x
  2. Step 2: Convert to fraction form
    388,769.36/536,491.56 = 218,993.36/x
  3. Step 3: Cross multiply
    388,769.36x = 536,491.56 × 218,993.36
  4. Step 4: Simplify right side
    388,769.36x = 117,488,089,336.04
  5. Step 5: Solve for x
    x = 117,488,089,336.04/388,769.36
  6. Step 6: Final answer
    x = 302,205.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.