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Finding the Fourth Proportional to 321,200.10, 481,800.15 and 99,555.30

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Solution

The fourth proportional to 321,200.10, 481,800.15 and 99,555.30 is: 149,332.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,200.10 : 481,800.15 = 99,555.30 : x
  2. Step 2: Convert to fraction form
    321,200.10/481,800.15 = 99,555.30/x
  3. Step 3: Cross multiply
    321,200.10x = 481,800.15 × 99,555.30
  4. Step 4: Simplify right side
    321,200.10x = 47,965,758,473.30
  5. Step 5: Solve for x
    x = 47,965,758,473.30/321,200.10
  6. Step 6: Final answer
    x = 149,332.95

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Double scale
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Similar ratio
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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.