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Finding the Fourth Proportional to 766,635, 1,057,912.29 and 439,878.84

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Solution

The fourth proportional to 766,635, 1,057,912.29 and 439,878.84 is: 607,007.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,635 : 1,057,912.29 = 439,878.84 : x
  2. Step 2: Convert to fraction form
    766,635/1,057,912.29 = 439,878.84/x
  3. Step 3: Cross multiply
    766,635x = 1,057,912.29 × 439,878.84
  4. Step 4: Simplify right side
    766,635x = 465,353,230,946.94
  5. Step 5: Solve for x
    x = 465,353,230,946.94/766,635
  6. Step 6: Final answer
    x = 607,007.55

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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.