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Finding the Fourth Proportional to 388,135.16, 535,626.41 and 216,049.39

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Solution

The fourth proportional to 388,135.16, 535,626.41 and 216,049.39 is: 298,148.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,135.16 : 535,626.41 = 216,049.39 : x
  2. Step 2: Convert to fraction form
    388,135.16/535,626.41 = 216,049.39/x
  3. Step 3: Cross multiply
    388,135.16x = 535,626.41 × 216,049.39
  4. Step 4: Simplify right side
    388,135.16x = 115,721,756,729.08
  5. Step 5: Solve for x
    x = 115,721,756,729.08/388,135.16
  6. Step 6: Final answer
    x = 298,148.09

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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.