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Finding the Fourth Proportional to 646,986.60, 970,508.70 and 220,516.20

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Solution

The fourth proportional to 646,986.60, 970,508.70 and 220,516.20 is: 330,784.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,986.60 : 970,508.70 = 220,516.20 : x
  2. Step 2: Convert to fraction form
    646,986.60/970,508.70 = 220,516.20/x
  3. Step 3: Cross multiply
    646,986.60x = 970,508.70 × 220,516.20
  4. Step 4: Simplify right side
    646,986.60x = 214,012,890,590.94
  5. Step 5: Solve for x
    x = 214,012,890,590.94/646,986.60
  6. Step 6: Final answer
    x = 330,784.12

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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.