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Finding the Fourth Proportional to 290,318.38, 435,237.81 and 128,096.94

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Solution

The fourth proportional to 290,318.38, 435,237.81 and 128,096.94 is: 192,039.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,318.38 : 435,237.81 = 128,096.94 : x
  2. Step 2: Convert to fraction form
    290,318.38/435,237.81 = 128,096.94/x
  3. Step 3: Cross multiply
    290,318.38x = 435,237.81 × 128,096.94
  4. Step 4: Simplify right side
    290,318.38x = 55,752,632,281.52
  5. Step 5: Solve for x
    x = 55,752,632,281.52/290,318.38
  6. Step 6: Final answer
    x = 192,039.62

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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.