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Finding the Fourth Proportional to 352,988.82, 487,195.43 and 209,721.29

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Solution

The fourth proportional to 352,988.82, 487,195.43 and 209,721.29 is: 289,457.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,988.82 : 487,195.43 = 209,721.29 : x
  2. Step 2: Convert to fraction form
    352,988.82/487,195.43 = 209,721.29/x
  3. Step 3: Cross multiply
    352,988.82x = 487,195.43 × 209,721.29
  4. Step 4: Simplify right side
    352,988.82x = 102,175,250,577.12
  5. Step 5: Solve for x
    x = 102,175,250,577.12/352,988.82
  6. Step 6: Final answer
    x = 289,457.47

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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.