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Finding the Fourth Proportional to 646,685.10, 970,027.65 and 225,906.30

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Solution

The fourth proportional to 646,685.10, 970,027.65 and 225,906.30 is: 338,859.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,685.10 : 970,027.65 = 225,906.30 : x
  2. Step 2: Convert to fraction form
    646,685.10/970,027.65 = 225,906.30/x
  3. Step 3: Cross multiply
    646,685.10x = 970,027.65 × 225,906.30
  4. Step 4: Simplify right side
    646,685.10x = 219,135,357,309.20
  5. Step 5: Solve for x
    x = 219,135,357,309.20/646,685.10
  6. Step 6: Final answer
    x = 338,859.45

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Half scale
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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.