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Finding the Fourth Proportional to 489,682.44, 675,586.71 and 308,405.66

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Solution

The fourth proportional to 489,682.44, 675,586.71 and 308,405.66 is: 425,489.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,682.44 : 675,586.71 = 308,405.66 : x
  2. Step 2: Convert to fraction form
    489,682.44/675,586.71 = 308,405.66/x
  3. Step 3: Cross multiply
    489,682.44x = 675,586.71 × 308,405.66
  4. Step 4: Simplify right side
    489,682.44x = 208,354,761,806.85
  5. Step 5: Solve for x
    x = 208,354,761,806.85/489,682.44
  6. Step 6: Final answer
    x = 425,489.55

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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.