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Finding the Fourth Proportional to 553,996.49, 764,504.39 and 312,274.46

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Solution

The fourth proportional to 553,996.49, 764,504.39 and 312,274.46 is: 430,932.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,996.49 : 764,504.39 = 312,274.46 : x
  2. Step 2: Convert to fraction form
    553,996.49/764,504.39 = 312,274.46/x
  3. Step 3: Cross multiply
    553,996.49x = 764,504.39 × 312,274.46
  4. Step 4: Simplify right side
    553,996.49x = 238,735,198,246.83
  5. Step 5: Solve for x
    x = 238,735,198,246.83/553,996.49
  6. Step 6: Final answer
    x = 430,932.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.