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Finding the Fourth Proportional to 323,491.28, 485,509.56 and 136,636.88

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Solution

The fourth proportional to 323,491.28, 485,509.56 and 136,636.88 is: 205,070.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,491.28 : 485,509.56 = 136,636.88 : x
  2. Step 2: Convert to fraction form
    323,491.28/485,509.56 = 136,636.88/x
  3. Step 3: Cross multiply
    323,491.28x = 485,509.56 × 136,636.88
  4. Step 4: Simplify right side
    323,491.28x = 66,338,511,488.57
  5. Step 5: Solve for x
    x = 66,338,511,488.57/323,491.28
  6. Step 6: Final answer
    x = 205,070.48

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1.5x scale

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.