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Finding the Fourth Proportional to 388,208.87, 535,620.62 and 233,120.15

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Solution

The fourth proportional to 388,208.87, 535,620.62 and 233,120.15 is: 321,641.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,208.87 : 535,620.62 = 233,120.15 : x
  2. Step 2: Convert to fraction form
    388,208.87/535,620.62 = 233,120.15/x
  3. Step 3: Cross multiply
    388,208.87x = 535,620.62 × 233,120.15
  4. Step 4: Simplify right side
    388,208.87x = 124,863,959,277.49
  5. Step 5: Solve for x
    x = 124,863,959,277.49/388,208.87
  6. Step 6: Final answer
    x = 321,641.18

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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.