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Finding the Fourth Proportional to 412,639.67, 618,959.51 and 272,365.49

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Solution

The fourth proportional to 412,639.67, 618,959.51 and 272,365.49 is: 408,548.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,639.67 : 618,959.51 = 272,365.49 : x
  2. Step 2: Convert to fraction form
    412,639.67/618,959.51 = 272,365.49/x
  3. Step 3: Cross multiply
    412,639.67x = 618,959.51 × 272,365.49
  4. Step 4: Simplify right side
    412,639.67x = 168,583,205,774.69
  5. Step 5: Solve for x
    x = 168,583,205,774.69/412,639.67
  6. Step 6: Final answer
    x = 408,548.23

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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.