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Finding the Fourth Proportional to 489,729.88, 734,508.78 and 134,658.28

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Solution

The fourth proportional to 489,729.88, 734,508.78 and 134,658.28 is: 201,963.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,729.88 : 734,508.78 = 134,658.28 : x
  2. Step 2: Convert to fraction form
    489,729.88/734,508.78 = 134,658.28/x
  3. Step 3: Cross multiply
    489,729.88x = 734,508.78 × 134,658.28
  4. Step 4: Simplify right side
    489,729.88x = 98,907,688,959.70
  5. Step 5: Solve for x
    x = 98,907,688,959.70/489,729.88
  6. Step 6: Final answer
    x = 201,963.76

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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.