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Finding the Fourth Proportional to 509,362.39, 764,042.76 and 135,385.39

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Solution

The fourth proportional to 509,362.39, 764,042.76 and 135,385.39 is: 203,077.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,362.39 : 764,042.76 = 135,385.39 : x
  2. Step 2: Convert to fraction form
    509,362.39/764,042.76 = 135,385.39/x
  3. Step 3: Cross multiply
    509,362.39x = 764,042.76 × 135,385.39
  4. Step 4: Simplify right side
    509,362.39x = 103,440,227,039.28
  5. Step 5: Solve for x
    x = 103,440,227,039.28/509,362.39
  6. Step 6: Final answer
    x = 203,077.87

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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.