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Finding the Fourth Proportional to 445,540.80, 668,311.20 and 130,029.60

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Solution

The fourth proportional to 445,540.80, 668,311.20 and 130,029.60 is: 195,044.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,540.80 : 668,311.20 = 130,029.60 : x
  2. Step 2: Convert to fraction form
    445,540.80/668,311.20 = 130,029.60/x
  3. Step 3: Cross multiply
    445,540.80x = 668,311.20 × 130,029.60
  4. Step 4: Simplify right side
    445,540.80x = 86,900,238,011.52
  5. Step 5: Solve for x
    x = 86,900,238,011.52/445,540.80
  6. Step 6: Final answer
    x = 195,044.40

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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.