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Finding the Fourth Proportional to 387,308.88, 534,536.28 and 217,543

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Solution

The fourth proportional to 387,308.88, 534,536.28 and 217,543 is: 300,237.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,308.88 : 534,536.28 = 217,543 : x
  2. Step 2: Convert to fraction form
    387,308.88/534,536.28 = 217,543/x
  3. Step 3: Cross multiply
    387,308.88x = 534,536.28 × 217,543
  4. Step 4: Simplify right side
    387,308.88x = 116,284,625,960.04
  5. Step 5: Solve for x
    x = 116,284,625,960.04/387,308.88
  6. Step 6: Final answer
    x = 300,237.44

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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.