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Finding the Fourth Proportional to 388,414.48, 536,022.12 and 218,654.80

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Solution

The fourth proportional to 388,414.48, 536,022.12 and 218,654.80 is: 301,749.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,414.48 : 536,022.12 = 218,654.80 : x
  2. Step 2: Convert to fraction form
    388,414.48/536,022.12 = 218,654.80/x
  3. Step 3: Cross multiply
    388,414.48x = 536,022.12 × 218,654.80
  4. Step 4: Simplify right side
    388,414.48x = 117,203,809,444.18
  5. Step 5: Solve for x
    x = 117,203,809,444.18/388,414.48
  6. Step 6: Final answer
    x = 301,749.33

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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.