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Finding the Fourth Proportional to 568,907.38, 853,485.71 and 213,921.40

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Solution

The fourth proportional to 568,907.38, 853,485.71 and 213,921.40 is: 320,928.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    568,907.38 : 853,485.71 = 213,921.40 : x
  2. Step 2: Convert to fraction form
    568,907.38/853,485.71 = 213,921.40/x
  3. Step 3: Cross multiply
    568,907.38x = 853,485.71 × 213,921.40
  4. Step 4: Simplify right side
    568,907.38x = 182,578,857,963.19
  5. Step 5: Solve for x
    x = 182,578,857,963.19/568,907.38
  6. Step 6: Final answer
    x = 320,928.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.