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Finding the Fourth Proportional to 353,379.74, 487,676.78 and 202,505.90

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Solution

The fourth proportional to 353,379.74, 487,676.78 and 202,505.90 is: 279,465.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,379.74 : 487,676.78 = 202,505.90 : x
  2. Step 2: Convert to fraction form
    353,379.74/487,676.78 = 202,505.90/x
  3. Step 3: Cross multiply
    353,379.74x = 487,676.78 × 202,505.90
  4. Step 4: Simplify right side
    353,379.74x = 98,757,425,749.27
  5. Step 5: Solve for x
    x = 98,757,425,749.27/353,379.74
  6. Step 6: Final answer
    x = 279,465.44

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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.