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Finding the Fourth Proportional to 509,720.20, 764,577.60 and 130,640.20

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Solution

The fourth proportional to 509,720.20, 764,577.60 and 130,640.20 is: 195,959.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,720.20 : 764,577.60 = 130,640.20 : x
  2. Step 2: Convert to fraction form
    509,720.20/764,577.60 = 130,640.20/x
  3. Step 3: Cross multiply
    509,720.20x = 764,577.60 × 130,640.20
  4. Step 4: Simplify right side
    509,720.20x = 99,884,570,579.52
  5. Step 5: Solve for x
    x = 99,884,570,579.52/509,720.20
  6. Step 6: Final answer
    x = 195,959.61

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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.