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Finding the Fourth Proportional to 368,535.64, 552,936.47 and 128,684.90

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Solution

The fourth proportional to 368,535.64, 552,936.47 and 128,684.90 is: 193,073.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,535.64 : 552,936.47 = 128,684.90 : x
  2. Step 2: Convert to fraction form
    368,535.64/552,936.47 = 128,684.90/x
  3. Step 3: Cross multiply
    368,535.64x = 552,936.47 × 128,684.90
  4. Step 4: Simplify right side
    368,535.64x = 71,154,570,940.20
  5. Step 5: Solve for x
    x = 71,154,570,940.20/368,535.64
  6. Step 6: Final answer
    x = 193,073.79

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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.