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Finding the Fourth Proportional to 509,715.20, 764,378.40 and 154,611.20

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Solution

The fourth proportional to 509,715.20, 764,378.40 and 154,611.20 is: 231,857.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,715.20 : 764,378.40 = 154,611.20 : x
  2. Step 2: Convert to fraction form
    509,715.20/764,378.40 = 154,611.20/x
  3. Step 3: Cross multiply
    509,715.20x = 764,378.40 × 154,611.20
  4. Step 4: Simplify right side
    509,715.20x = 118,181,461,678.08
  5. Step 5: Solve for x
    x = 118,181,461,678.08/509,715.20
  6. Step 6: Final answer
    x = 231,857.83

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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.