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Finding the Fourth Proportional to 484,174.36, 726,261.60 and 129,189.70

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Solution

The fourth proportional to 484,174.36, 726,261.60 and 129,189.70 is: 193,784.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,174.36 : 726,261.60 = 129,189.70 : x
  2. Step 2: Convert to fraction form
    484,174.36/726,261.60 = 129,189.70/x
  3. Step 3: Cross multiply
    484,174.36x = 726,261.60 × 129,189.70
  4. Step 4: Simplify right side
    484,174.36x = 93,825,518,225.52
  5. Step 5: Solve for x
    x = 93,825,518,225.52/484,174.36
  6. Step 6: Final answer
    x = 193,784.57

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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.