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Finding the Fourth Proportional to 388,048.05, 535,504.32 and 218,283.39

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Solution

The fourth proportional to 388,048.05, 535,504.32 and 218,283.39 is: 301,229.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,048.05 : 535,504.32 = 218,283.39 : x
  2. Step 2: Convert to fraction form
    388,048.05/535,504.32 = 218,283.39/x
  3. Step 3: Cross multiply
    388,048.05x = 535,504.32 × 218,283.39
  4. Step 4: Simplify right side
    388,048.05x = 116,891,698,329.25
  5. Step 5: Solve for x
    x = 116,891,698,329.25/388,048.05
  6. Step 6: Final answer
    x = 301,229.96

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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.