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Finding the Fourth Proportional to 418,428.20, 627,636.83 and 102,887.84

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Solution

The fourth proportional to 418,428.20, 627,636.83 and 102,887.84 is: 154,330.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,428.20 : 627,636.83 = 102,887.84 : x
  2. Step 2: Convert to fraction form
    418,428.20/627,636.83 = 102,887.84/x
  3. Step 3: Cross multiply
    418,428.20x = 627,636.83 × 102,887.84
  4. Step 4: Simplify right side
    418,428.20x = 64,576,194,090.52
  5. Step 5: Solve for x
    x = 64,576,194,090.52/418,428.20
  6. Step 6: Final answer
    x = 154,330.41

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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.