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Finding the Fourth Proportional to 376,871.09, 520,082.10 and 207,105.21

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Solution

The fourth proportional to 376,871.09, 520,082.10 and 207,105.21 is: 285,805.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,871.09 : 520,082.10 = 207,105.21 : x
  2. Step 2: Convert to fraction form
    376,871.09/520,082.10 = 207,105.21/x
  3. Step 3: Cross multiply
    376,871.09x = 520,082.10 × 207,105.21
  4. Step 4: Simplify right side
    376,871.09x = 107,711,712,537.74
  5. Step 5: Solve for x
    x = 107,711,712,537.74/376,871.09
  6. Step 6: Final answer
    x = 285,805.19

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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.