Home / 643,121.40-964,682.10-222,353.40

Finding the Fourth Proportional to 643,121.40, 964,682.10 and 222,353.40

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Solution

The fourth proportional to 643,121.40, 964,682.10 and 222,353.40 is: 333,530.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,121.40 : 964,682.10 = 222,353.40 : x
  2. Step 2: Convert to fraction form
    643,121.40/964,682.10 = 222,353.40/x
  3. Step 3: Cross multiply
    643,121.40x = 964,682.10 × 222,353.40
  4. Step 4: Simplify right side
    643,121.40x = 214,500,344,854.14
  5. Step 5: Solve for x
    x = 214,500,344,854.14/643,121.40
  6. Step 6: Final answer
    x = 333,530.10

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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.