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Finding the Fourth Proportional to 376,768.72, 519,939.30 and 215,623

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Solution

The fourth proportional to 376,768.72, 519,939.30 and 215,623 is: 297,558.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,768.72 : 519,939.30 = 215,623 : x
  2. Step 2: Convert to fraction form
    376,768.72/519,939.30 = 215,623/x
  3. Step 3: Cross multiply
    376,768.72x = 519,939.30 × 215,623
  4. Step 4: Simplify right side
    376,768.72x = 112,110,871,683.90
  5. Step 5: Solve for x
    x = 112,110,871,683.90/376,768.72
  6. Step 6: Final answer
    x = 297,558.86

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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.