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Finding the Fourth Proportional to 716,884.48, 989,262.93 and 394,532.97

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Solution

The fourth proportional to 716,884.48, 989,262.93 and 394,532.97 is: 544,434.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,884.48 : 989,262.93 = 394,532.97 : x
  2. Step 2: Convert to fraction form
    716,884.48/989,262.93 = 394,532.97/x
  3. Step 3: Cross multiply
    716,884.48x = 989,262.93 × 394,532.97
  4. Step 4: Simplify right side
    716,884.48x = 390,296,841,883.80
  5. Step 5: Solve for x
    x = 390,296,841,883.80/716,884.48
  6. Step 6: Final answer
    x = 544,434.78

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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.