Home / 379,720.08-523,992.78-209,943

Finding the Fourth Proportional to 379,720.08, 523,992.78 and 209,943

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Solution

The fourth proportional to 379,720.08, 523,992.78 and 209,943 is: 289,709.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,720.08 : 523,992.78 = 209,943 : x
  2. Step 2: Convert to fraction form
    379,720.08/523,992.78 = 209,943/x
  3. Step 3: Cross multiply
    379,720.08x = 523,992.78 × 209,943
  4. Step 4: Simplify right side
    379,720.08x = 110,008,616,211.54
  5. Step 5: Solve for x
    x = 110,008,616,211.54/379,720.08
  6. Step 6: Final answer
    x = 289,709.77

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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.