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Finding the Fourth Proportional to 859,421.76, 1,289,016 and 252,193.92

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Solution

The fourth proportional to 859,421.76, 1,289,016 and 252,193.92 is: 378,256.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,421.76 : 1,289,016 = 252,193.92 : x
  2. Step 2: Convert to fraction form
    859,421.76/1,289,016 = 252,193.92/x
  3. Step 3: Cross multiply
    859,421.76x = 1,289,016 × 252,193.92
  4. Step 4: Simplify right side
    859,421.76x = 325,081,997,982.72
  5. Step 5: Solve for x
    x = 325,081,997,982.72/859,421.76
  6. Step 6: Final answer
    x = 378,256.65

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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.