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Finding the Fourth Proportional to 489,628.87, 675,514.62 and 319,961.41

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Solution

The fourth proportional to 489,628.87, 675,514.62 and 319,961.41 is: 441,433.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,628.87 : 675,514.62 = 319,961.41 : x
  2. Step 2: Convert to fraction form
    489,628.87/675,514.62 = 319,961.41/x
  3. Step 3: Cross multiply
    489,628.87x = 675,514.62 × 319,961.41
  4. Step 4: Simplify right side
    489,628.87x = 216,138,610,290.81
  5. Step 5: Solve for x
    x = 216,138,610,290.81/489,628.87
  6. Step 6: Final answer
    x = 441,433.55

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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.