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Finding the Fourth Proportional to 418,929.69, 627,601.67 and 247,638.59

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Solution

The fourth proportional to 418,929.69, 627,601.67 and 247,638.59 is: 370,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,929.69 : 627,601.67 = 247,638.59 : x
  2. Step 2: Convert to fraction form
    418,929.69/627,601.67 = 247,638.59/x
  3. Step 3: Cross multiply
    418,929.69x = 627,601.67 × 247,638.59
  4. Step 4: Simplify right side
    418,929.69x = 155,418,392,640.45
  5. Step 5: Solve for x
    x = 155,418,392,640.45/418,929.69
  6. Step 6: Final answer
    x = 370,989.20

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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.