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Finding the Fourth Proportional to 643,571.80, 965,357.70 and 222,707.80

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Solution

The fourth proportional to 643,571.80, 965,357.70 and 222,707.80 is: 334,061.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,571.80 : 965,357.70 = 222,707.80 : x
  2. Step 2: Convert to fraction form
    643,571.80/965,357.70 = 222,707.80/x
  3. Step 3: Cross multiply
    643,571.80x = 965,357.70 × 222,707.80
  4. Step 4: Simplify right side
    643,571.80x = 214,992,689,580.06
  5. Step 5: Solve for x
    x = 214,992,689,580.06/643,571.80
  6. Step 6: Final answer
    x = 334,061.70

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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.