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Finding the Fourth Proportional to 678,359.52, 936,162.46 and 372,448.79

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Solution

The fourth proportional to 678,359.52, 936,162.46 and 372,448.79 is: 513,993.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,359.52 : 936,162.46 = 372,448.79 : x
  2. Step 2: Convert to fraction form
    678,359.52/936,162.46 = 372,448.79/x
  3. Step 3: Cross multiply
    678,359.52x = 936,162.46 × 372,448.79
  4. Step 4: Simplify right side
    678,359.52x = 348,672,576,879.71
  5. Step 5: Solve for x
    x = 348,672,576,879.71/678,359.52
  6. Step 6: Final answer
    x = 513,993.79

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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.