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Finding the Fourth Proportional to 222,905.80, 334,358.70 and 128,427.40

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Solution

The fourth proportional to 222,905.80, 334,358.70 and 128,427.40 is: 192,641.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,905.80 : 334,358.70 = 128,427.40 : x
  2. Step 2: Convert to fraction form
    222,905.80/334,358.70 = 128,427.40/x
  3. Step 3: Cross multiply
    222,905.80x = 334,358.70 × 128,427.40
  4. Step 4: Simplify right side
    222,905.80x = 42,940,818,508.38
  5. Step 5: Solve for x
    x = 42,940,818,508.38/222,905.80
  6. Step 6: Final answer
    x = 192,641.10

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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.