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Finding the Fourth Proportional to 388,392.31, 535,836.31 and 387,793.56

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Solution

The fourth proportional to 388,392.31, 535,836.31 and 387,793.56 is: 535,010.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,392.31 : 535,836.31 = 387,793.56 : x
  2. Step 2: Convert to fraction form
    388,392.31/535,836.31 = 387,793.56/x
  3. Step 3: Cross multiply
    388,392.31x = 535,836.31 × 387,793.56
  4. Step 4: Simplify right side
    388,392.31x = 207,793,870,232.16
  5. Step 5: Solve for x
    x = 207,793,870,232.16/388,392.31
  6. Step 6: Final answer
    x = 535,010.26

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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.