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Finding the Fourth Proportional to 643,578.80, 965,368.20 and 222,714.80

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Solution

The fourth proportional to 643,578.80, 965,368.20 and 222,714.80 is: 334,072.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,578.80 : 965,368.20 = 222,714.80 : x
  2. Step 2: Convert to fraction form
    643,578.80/965,368.20 = 222,714.80/x
  3. Step 3: Cross multiply
    643,578.80x = 965,368.20 × 222,714.80
  4. Step 4: Simplify right side
    643,578.80x = 215,001,785,589.36
  5. Step 5: Solve for x
    x = 215,001,785,589.36/643,578.80
  6. Step 6: Final answer
    x = 334,072.20

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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.