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Finding the Fourth Proportional to 716,668.82, 988,982.02 and 394,378.73

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Solution

The fourth proportional to 716,668.82, 988,982.02 and 394,378.73 is: 544,231.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,668.82 : 988,982.02 = 394,378.73 : x
  2. Step 2: Convert to fraction form
    716,668.82/988,982.02 = 394,378.73/x
  3. Step 3: Cross multiply
    716,668.82x = 988,982.02 × 394,378.73
  4. Step 4: Simplify right side
    716,668.82x = 390,033,473,040.44
  5. Step 5: Solve for x
    x = 390,033,473,040.44/716,668.82
  6. Step 6: Final answer
    x = 544,231.12

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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.