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Finding the Fourth Proportional to 643,363.40, 965,279.10 and 222,681.80

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Solution

The fourth proportional to 643,363.40, 965,279.10 and 222,681.80 is: 334,103.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,363.40 : 965,279.10 = 222,681.80 : x
  2. Step 2: Convert to fraction form
    643,363.40/965,279.10 = 222,681.80/x
  3. Step 3: Cross multiply
    643,363.40x = 965,279.10 × 222,681.80
  4. Step 4: Simplify right side
    643,363.40x = 214,950,087,490.38
  5. Step 5: Solve for x
    x = 214,950,087,490.38/643,363.40
  6. Step 6: Final answer
    x = 334,103.69

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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.