Home / 509,921.70-764,882.55-421,275.30

Finding the Fourth Proportional to 509,921.70, 764,882.55 and 421,275.30

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Solution

The fourth proportional to 509,921.70, 764,882.55 and 421,275.30 is: 631,912.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,921.70 : 764,882.55 = 421,275.30 : x
  2. Step 2: Convert to fraction form
    509,921.70/764,882.55 = 421,275.30/x
  3. Step 3: Cross multiply
    509,921.70x = 764,882.55 × 421,275.30
  4. Step 4: Simplify right side
    509,921.70x = 322,226,125,716.02
  5. Step 5: Solve for x
    x = 322,226,125,716.02/509,921.70
  6. Step 6: Final answer
    x = 631,912.95

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Similar ratio
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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.