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Finding the Fourth Proportional to 646,891.20, 970,336.80 and 328,026.60

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Solution

The fourth proportional to 646,891.20, 970,336.80 and 328,026.60 is: 492,039.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,891.20 : 970,336.80 = 328,026.60 : x
  2. Step 2: Convert to fraction form
    646,891.20/970,336.80 = 328,026.60/x
  3. Step 3: Cross multiply
    646,891.20x = 970,336.80 × 328,026.60
  4. Step 4: Simplify right side
    646,891.20x = 318,296,281,358.88
  5. Step 5: Solve for x
    x = 318,296,281,358.88/646,891.20
  6. Step 6: Final answer
    x = 492,039.90

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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.