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Finding the Fourth Proportional to 396,699, 595,047.29 and 143,979.15

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Solution

The fourth proportional to 396,699, 595,047.29 and 143,979.15 is: 215,968.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,699 : 595,047.29 = 143,979.15 : x
  2. Step 2: Convert to fraction form
    396,699/595,047.29 = 143,979.15/x
  3. Step 3: Cross multiply
    396,699x = 595,047.29 × 143,979.15
  4. Step 4: Simplify right side
    396,699x = 85,674,402,304.11
  5. Step 5: Solve for x
    x = 85,674,402,304.11/396,699
  6. Step 6: Final answer
    x = 215,968.28

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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.