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Finding the Fourth Proportional to 352,711.96, 486,666.78 and 209,520.28

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Solution

The fourth proportional to 352,711.96, 486,666.78 and 209,520.28 is: 289,093.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,711.96 : 486,666.78 = 209,520.28 : x
  2. Step 2: Convert to fraction form
    352,711.96/486,666.78 = 209,520.28/x
  3. Step 3: Cross multiply
    352,711.96x = 486,666.78 × 209,520.28
  4. Step 4: Simplify right side
    352,711.96x = 101,966,560,012.30
  5. Step 5: Solve for x
    x = 101,966,560,012.30/352,711.96
  6. Step 6: Final answer
    x = 289,093.00

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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.