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Finding the Fourth Proportional to 418,666.89, 627,998.97 and 115,061.48

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Solution

The fourth proportional to 418,666.89, 627,998.97 and 115,061.48 is: 172,591.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,666.89 : 627,998.97 = 115,061.48 : x
  2. Step 2: Convert to fraction form
    418,666.89/627,998.97 = 115,061.48/x
  3. Step 3: Cross multiply
    418,666.89x = 627,998.97 × 115,061.48
  4. Step 4: Simplify right side
    418,666.89x = 72,258,490,573.16
  5. Step 5: Solve for x
    x = 72,258,490,573.16/418,666.89
  6. Step 6: Final answer
    x = 172,591.84

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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.