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Finding the Fourth Proportional to 716,673.60, 988,969.68 and 394,331.28

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Solution

The fourth proportional to 716,673.60, 988,969.68 and 394,331.28 is: 544,155.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,673.60 : 988,969.68 = 394,331.28 : x
  2. Step 2: Convert to fraction form
    716,673.60/988,969.68 = 394,331.28/x
  3. Step 3: Cross multiply
    716,673.60x = 988,969.68 × 394,331.28
  4. Step 4: Simplify right side
    716,673.60x = 389,981,679,795.59
  5. Step 5: Solve for x
    x = 389,981,679,795.59/716,673.60
  6. Step 6: Final answer
    x = 544,155.22

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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.