Home / 509,939.10-764,981.55-172,995.30

Finding the Fourth Proportional to 509,939.10, 764,981.55 and 172,995.30

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Solution

The fourth proportional to 509,939.10, 764,981.55 and 172,995.30 is: 259,517.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,939.10 : 764,981.55 = 172,995.30 : x
  2. Step 2: Convert to fraction form
    509,939.10/764,981.55 = 172,995.30/x
  3. Step 3: Cross multiply
    509,939.10x = 764,981.55 × 172,995.30
  4. Step 4: Simplify right side
    509,939.10x = 132,338,212,736.72
  5. Step 5: Solve for x
    x = 132,338,212,736.72/509,939.10
  6. Step 6: Final answer
    x = 259,517.68

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1.5x scale

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.