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Finding the Fourth Proportional to 426,366.81, 638,850.38 and 145,730.97

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Solution

The fourth proportional to 426,366.81, 638,850.38 and 145,730.97 is: 218,357.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,366.81 : 638,850.38 = 145,730.97 : x
  2. Step 2: Convert to fraction form
    426,366.81/638,850.38 = 145,730.97/x
  3. Step 3: Cross multiply
    426,366.81x = 638,850.38 × 145,730.97
  4. Step 4: Simplify right side
    426,366.81x = 93,100,284,833.61
  5. Step 5: Solve for x
    x = 93,100,284,833.61/426,366.81
  6. Step 6: Final answer
    x = 218,357.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.