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Finding the Fourth Proportional to 509,491.70, 764,043.15 and 154,387.70

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Solution

The fourth proportional to 509,491.70, 764,043.15 and 154,387.70 is: 231,522.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,491.70 : 764,043.15 = 154,387.70 : x
  2. Step 2: Convert to fraction form
    509,491.70/764,043.15 = 154,387.70/x
  3. Step 3: Cross multiply
    509,491.70x = 764,043.15 × 154,387.70
  4. Step 4: Simplify right side
    509,491.70x = 117,958,864,629.26
  5. Step 5: Solve for x
    x = 117,958,864,629.26/509,491.70
  6. Step 6: Final answer
    x = 231,522.64

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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.