Home / 353,072.20-487,191.54-209,779.96

Finding the Fourth Proportional to 353,072.20, 487,191.54 and 209,779.96

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Solution

The fourth proportional to 353,072.20, 487,191.54 and 209,779.96 is: 289,467.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,072.20 : 487,191.54 = 209,779.96 : x
  2. Step 2: Convert to fraction form
    353,072.20/487,191.54 = 209,779.96/x
  3. Step 3: Cross multiply
    353,072.20x = 487,191.54 × 209,779.96
  4. Step 4: Simplify right side
    353,072.20x = 102,203,021,773.54
  5. Step 5: Solve for x
    x = 102,203,021,773.54/353,072.20
  6. Step 6: Final answer
    x = 289,467.77

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1.5x scale

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.