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Finding the Fourth Proportional to 445,511.80, 668,267.70 and 130,000.60

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Solution

The fourth proportional to 445,511.80, 668,267.70 and 130,000.60 is: 195,000.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,511.80 : 668,267.70 = 130,000.60 : x
  2. Step 2: Convert to fraction form
    445,511.80/668,267.70 = 130,000.60/x
  3. Step 3: Cross multiply
    445,511.80x = 668,267.70 × 130,000.60
  4. Step 4: Simplify right side
    445,511.80x = 86,875,201,960.62
  5. Step 5: Solve for x
    x = 86,875,201,960.62/445,511.80
  6. Step 6: Final answer
    x = 195,000.90

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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.