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Finding the Fourth Proportional to 388,969.62, 536,776.07 and 225,659.15

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Solution

The fourth proportional to 388,969.62, 536,776.07 and 225,659.15 is: 311,408.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,969.62 : 536,776.07 = 225,659.15 : x
  2. Step 2: Convert to fraction form
    388,969.62/536,776.07 = 225,659.15/x
  3. Step 3: Cross multiply
    388,969.62x = 536,776.07 × 225,659.15
  4. Step 4: Simplify right side
    388,969.62x = 121,128,431,696.54
  5. Step 5: Solve for x
    x = 121,128,431,696.54/388,969.62
  6. Step 6: Final answer
    x = 311,408.46

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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.