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Finding the Fourth Proportional to 226,443.84, 312,485.75 and 129,644.48

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Solution

The fourth proportional to 226,443.84, 312,485.75 and 129,644.48 is: 178,905.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    226,443.84 : 312,485.75 = 129,644.48 : x
  2. Step 2: Convert to fraction form
    226,443.84/312,485.75 = 129,644.48/x
  3. Step 3: Cross multiply
    226,443.84x = 312,485.75 × 129,644.48
  4. Step 4: Simplify right side
    226,443.84x = 40,512,053,185.32
  5. Step 5: Solve for x
    x = 40,512,053,185.32/226,443.84
  6. Step 6: Final answer
    x = 178,905.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.