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Finding the Fourth Proportional to 489,429.35, 734,059.36 and 129,605.37

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Solution

The fourth proportional to 489,429.35, 734,059.36 and 129,605.37 is: 194,385.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,429.35 : 734,059.36 = 129,605.37 : x
  2. Step 2: Convert to fraction form
    489,429.35/734,059.36 = 129,605.37/x
  3. Step 3: Cross multiply
    489,429.35x = 734,059.36 × 129,605.37
  4. Step 4: Simplify right side
    489,429.35x = 95,138,034,954.76
  5. Step 5: Solve for x
    x = 95,138,034,954.76/489,429.35
  6. Step 6: Final answer
    x = 194,385.63

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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.