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Finding the Fourth Proportional to 454,940.59, 682,386.30 and 139,398.43

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Solution

The fourth proportional to 454,940.59, 682,386.30 and 139,398.43 is: 209,090.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    454,940.59 : 682,386.30 = 139,398.43 : x
  2. Step 2: Convert to fraction form
    454,940.59/682,386.30 = 139,398.43/x
  3. Step 3: Cross multiply
    454,940.59x = 682,386.30 × 139,398.43
  4. Step 4: Simplify right side
    454,940.59x = 95,123,578,873.51
  5. Step 5: Solve for x
    x = 95,123,578,873.51/454,940.59
  6. Step 6: Final answer
    x = 209,090.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.