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Finding the Fourth Proportional to 618,978.52, 928,467.78 and 408,567.25

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Solution

The fourth proportional to 618,978.52, 928,467.78 and 408,567.25 is: 612,850.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,978.52 : 928,467.78 = 408,567.25 : x
  2. Step 2: Convert to fraction form
    618,978.52/928,467.78 = 408,567.25/x
  3. Step 3: Cross multiply
    618,978.52x = 928,467.78 × 408,567.25
  4. Step 4: Simplify right side
    618,978.52x = 379,341,527,588.21
  5. Step 5: Solve for x
    x = 379,341,527,588.21/618,978.52
  6. Step 6: Final answer
    x = 612,850.88

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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.