Home / 645,876.09-967,928.40-408,795.57

Finding the Fourth Proportional to 645,876.09, 967,928.40 and 408,795.57

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Solution

The fourth proportional to 645,876.09, 967,928.40 and 408,795.57 is: 612,632.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,876.09 : 967,928.40 = 408,795.57 : x
  2. Step 2: Convert to fraction form
    645,876.09/967,928.40 = 408,795.57/x
  3. Step 3: Cross multiply
    645,876.09x = 967,928.40 × 408,795.57
  4. Step 4: Simplify right side
    645,876.09x = 395,684,841,997.19
  5. Step 5: Solve for x
    x = 395,684,841,997.19/645,876.09
  6. Step 6: Final answer
    x = 612,632.75

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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.