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Finding the Fourth Proportional to 352,553.31, 486,531.77 and 209,313.72

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Solution

The fourth proportional to 352,553.31, 486,531.77 and 209,313.72 is: 288,857.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,553.31 : 486,531.77 = 209,313.72 : x
  2. Step 2: Convert to fraction form
    352,553.31/486,531.77 = 209,313.72/x
  3. Step 3: Cross multiply
    352,553.31x = 486,531.77 × 209,313.72
  4. Step 4: Simplify right side
    352,553.31x = 101,837,773,630.32
  5. Step 5: Solve for x
    x = 101,837,773,630.32/352,553.31
  6. Step 6: Final answer
    x = 288,857.80

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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.