Home / 493,981.69-681,443.94-312,387.79

Finding the Fourth Proportional to 493,981.69, 681,443.94 and 312,387.79

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Solution

The fourth proportional to 493,981.69, 681,443.94 and 312,387.79 is: 430,936.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,981.69 : 681,443.94 = 312,387.79 : x
  2. Step 2: Convert to fraction form
    493,981.69/681,443.94 = 312,387.79/x
  3. Step 3: Cross multiply
    493,981.69x = 681,443.94 × 312,387.79
  4. Step 4: Simplify right side
    493,981.69x = 212,874,766,425.49
  5. Step 5: Solve for x
    x = 212,874,766,425.49/493,981.69
  6. Step 6: Final answer
    x = 430,936.55

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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.