Home / 646,285.20-968,844.60-421,753.20

Finding the Fourth Proportional to 646,285.20, 968,844.60 and 421,753.20

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Solution

The fourth proportional to 646,285.20, 968,844.60 and 421,753.20 is: 632,249.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,285.20 : 968,844.60 = 421,753.20 : x
  2. Step 2: Convert to fraction form
    646,285.20/968,844.60 = 421,753.20/x
  3. Step 3: Cross multiply
    646,285.20x = 968,844.60 × 421,753.20
  4. Step 4: Simplify right side
    646,285.20x = 408,613,310,352.72
  5. Step 5: Solve for x
    x = 408,613,310,352.72/646,285.20
  6. Step 6: Final answer
    x = 632,249.21

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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.