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Finding the Fourth Proportional to 418,641.63, 627,915.75 and 115,059.06

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Solution

The fourth proportional to 418,641.63, 627,915.75 and 115,059.06 is: 172,575.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,641.63 : 627,915.75 = 115,059.06 : x
  2. Step 2: Convert to fraction form
    418,641.63/627,915.75 = 115,059.06/x
  3. Step 3: Cross multiply
    418,641.63x = 627,915.75 × 115,059.06
  4. Step 4: Simplify right side
    418,641.63x = 72,247,395,954.20
  5. Step 5: Solve for x
    x = 72,247,395,954.20/418,641.63
  6. Step 6: Final answer
    x = 172,575.76

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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.