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Finding the Fourth Proportional to 387,860.59, 535,296.36 and 218,093.50

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Solution

The fourth proportional to 387,860.59, 535,296.36 and 218,093.50 is: 300,996.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,860.59 : 535,296.36 = 218,093.50 : x
  2. Step 2: Convert to fraction form
    387,860.59/535,296.36 = 218,093.50/x
  3. Step 3: Cross multiply
    387,860.59x = 535,296.36 × 218,093.50
  4. Step 4: Simplify right side
    387,860.59x = 116,744,656,689.66
  5. Step 5: Solve for x
    x = 116,744,656,689.66/387,860.59
  6. Step 6: Final answer
    x = 300,996.44

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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.