Home / 1,278,890.72-1,918,290.48-319,351.68

Finding the Fourth Proportional to 1,278,890.72, 1,918,290.48 and 319,351.68

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Solution

The fourth proportional to 1,278,890.72, 1,918,290.48 and 319,351.68 is: 479,016.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,890.72 : 1,918,290.48 = 319,351.68 : x
  2. Step 2: Convert to fraction form
    1,278,890.72/1,918,290.48 = 319,351.68/x
  3. Step 3: Cross multiply
    1,278,890.72x = 1,918,290.48 × 319,351.68
  4. Step 4: Simplify right side
    1,278,890.72x = 612,609,287,516.01
  5. Step 5: Solve for x
    x = 612,609,287,516.01/1,278,890.72
  6. Step 6: Final answer
    x = 479,016.13

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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.