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Finding the Fourth Proportional to 646,991.60, 970,516.20 and 220,521.20

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Solution

The fourth proportional to 646,991.60, 970,516.20 and 220,521.20 is: 330,791.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,991.60 : 970,516.20 = 220,521.20 : x
  2. Step 2: Convert to fraction form
    646,991.60/970,516.20 = 220,521.20/x
  3. Step 3: Cross multiply
    646,991.60x = 970,516.20 × 220,521.20
  4. Step 4: Simplify right side
    646,991.60x = 214,019,397,043.44
  5. Step 5: Solve for x
    x = 214,019,397,043.44/646,991.60
  6. Step 6: Final answer
    x = 330,791.62

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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.