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Finding the Fourth Proportional to 388,304.28, 535,734.81 and 218,505.60

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Solution

The fourth proportional to 388,304.28, 535,734.81 and 218,505.60 is: 301,467.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,304.28 : 535,734.81 = 218,505.60 : x
  2. Step 2: Convert to fraction form
    388,304.28/535,734.81 = 218,505.60/x
  3. Step 3: Cross multiply
    388,304.28x = 535,734.81 × 218,505.60
  4. Step 4: Simplify right side
    388,304.28x = 117,061,056,099.94
  5. Step 5: Solve for x
    x = 117,061,056,099.94/388,304.28
  6. Step 6: Final answer
    x = 301,467.33

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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.