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Finding the Fourth Proportional to 379,010.75, 523,058.72 and 217,890.81

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Solution

The fourth proportional to 379,010.75, 523,058.72 and 217,890.81 is: 300,703.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,010.75 : 523,058.72 = 217,890.81 : x
  2. Step 2: Convert to fraction form
    379,010.75/523,058.72 = 217,890.81/x
  3. Step 3: Cross multiply
    379,010.75x = 523,058.72 × 217,890.81
  4. Step 4: Simplify right side
    379,010.75x = 113,969,687,088.91
  5. Step 5: Solve for x
    x = 113,969,687,088.91/379,010.75
  6. Step 6: Final answer
    x = 300,703.05

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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.