Home / 663,836.67-915,957.19-388,141.47

Finding the Fourth Proportional to 663,836.67, 915,957.19 and 388,141.47

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Solution

The fourth proportional to 663,836.67, 915,957.19 and 388,141.47 is: 535,554.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,836.67 : 915,957.19 = 388,141.47 : x
  2. Step 2: Convert to fraction form
    663,836.67/915,957.19 = 388,141.47/x
  3. Step 3: Cross multiply
    663,836.67x = 915,957.19 × 388,141.47
  4. Step 4: Simplify right side
    663,836.67x = 355,520,970,183.67
  5. Step 5: Solve for x
    x = 355,520,970,183.67/663,836.67
  6. Step 6: Final answer
    x = 535,554.88

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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.