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Finding the Fourth Proportional to 489,683.44, 675,588.09 and 308,406.66

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Solution

The fourth proportional to 489,683.44, 675,588.09 and 308,406.66 is: 425,490.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,683.44 : 675,588.09 = 308,406.66 : x
  2. Step 2: Convert to fraction form
    489,683.44/675,588.09 = 308,406.66/x
  3. Step 3: Cross multiply
    489,683.44x = 675,588.09 × 308,406.66
  4. Step 4: Simplify right side
    489,683.44x = 208,355,866,372.68
  5. Step 5: Solve for x
    x = 208,355,866,372.68/489,683.44
  6. Step 6: Final answer
    x = 425,490.94

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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.