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Finding the Fourth Proportional to 379,313.30, 523,407.72 and 209,537.30

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Solution

The fourth proportional to 379,313.30, 523,407.72 and 209,537.30 is: 289,136.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,313.30 : 523,407.72 = 209,537.30 : x
  2. Step 2: Convert to fraction form
    379,313.30/523,407.72 = 209,537.30/x
  3. Step 3: Cross multiply
    379,313.30x = 523,407.72 × 209,537.30
  4. Step 4: Simplify right side
    379,313.30x = 109,673,436,783.23
  5. Step 5: Solve for x
    x = 109,673,436,783.23/379,313.30
  6. Step 6: Final answer
    x = 289,136.81

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1.5x scale

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.