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Finding the Fourth Proportional to 509,618.20, 764,424.60 and 130,538.20

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Solution

The fourth proportional to 509,618.20, 764,424.60 and 130,538.20 is: 195,806.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,618.20 : 764,424.60 = 130,538.20 : x
  2. Step 2: Convert to fraction form
    509,618.20/764,424.60 = 130,538.20/x
  3. Step 3: Cross multiply
    509,618.20x = 764,424.60 × 130,538.20
  4. Step 4: Simplify right side
    509,618.20x = 99,786,611,319.72
  5. Step 5: Solve for x
    x = 99,786,611,319.72/509,618.20
  6. Step 6: Final answer
    x = 195,806.61

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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.