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Finding the Fourth Proportional to 388,228.20, 535,708.20 and 216,104.76

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Solution

The fourth proportional to 388,228.20, 535,708.20 and 216,104.76 is: 298,198.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,228.20 : 535,708.20 = 216,104.76 : x
  2. Step 2: Convert to fraction form
    388,228.20/535,708.20 = 216,104.76/x
  3. Step 3: Cross multiply
    388,228.20x = 535,708.20 × 216,104.76
  4. Step 4: Simplify right side
    388,228.20x = 115,769,091,991.03
  5. Step 5: Solve for x
    x = 115,769,091,991.03/388,228.20
  6. Step 6: Final answer
    x = 298,198.56

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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.