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Finding the Fourth Proportional to 646,287.30, 969,042.15 and 331,359.30

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Solution

The fourth proportional to 646,287.30, 969,042.15 and 331,359.30 is: 496,839.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,287.30 : 969,042.15 = 331,359.30 : x
  2. Step 2: Convert to fraction form
    646,287.30/969,042.15 = 331,359.30/x
  3. Step 3: Cross multiply
    646,287.30x = 969,042.15 × 331,359.30
  4. Step 4: Simplify right side
    646,287.30x = 321,101,128,494.50
  5. Step 5: Solve for x
    x = 321,101,128,494.50/646,287.30
  6. Step 6: Final answer
    x = 496,839.61

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Double scale
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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.