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Finding the Fourth Proportional to 528,049.80, 792,074.70 and 172,978.20

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Solution

The fourth proportional to 528,049.80, 792,074.70 and 172,978.20 is: 259,467.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,049.80 : 792,074.70 = 172,978.20 : x
  2. Step 2: Convert to fraction form
    528,049.80/792,074.70 = 172,978.20/x
  3. Step 3: Cross multiply
    528,049.80x = 792,074.70 × 172,978.20
  4. Step 4: Simplify right side
    528,049.80x = 137,011,655,871.54
  5. Step 5: Solve for x
    x = 137,011,655,871.54/528,049.80
  6. Step 6: Final answer
    x = 259,467.30

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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.