Home / 509,923.60-764,861.10-172,931.20

Finding the Fourth Proportional to 509,923.60, 764,861.10 and 172,931.20

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Solution

The fourth proportional to 509,923.60, 764,861.10 and 172,931.20 is: 259,388.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,923.60 : 764,861.10 = 172,931.20 : x
  2. Step 2: Convert to fraction form
    509,923.60/764,861.10 = 172,931.20/x
  3. Step 3: Cross multiply
    509,923.60x = 764,861.10 × 172,931.20
  4. Step 4: Simplify right side
    509,923.60x = 132,268,347,856.32
  5. Step 5: Solve for x
    x = 132,268,347,856.32/509,923.60
  6. Step 6: Final answer
    x = 259,388.56

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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.