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Finding the Fourth Proportional to 239,628, 330,686.64 and 133,644

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Solution

The fourth proportional to 239,628, 330,686.64 and 133,644 is: 184,428.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,628 : 330,686.64 = 133,644 : x
  2. Step 2: Convert to fraction form
    239,628/330,686.64 = 133,644/x
  3. Step 3: Cross multiply
    239,628x = 330,686.64 × 133,644
  4. Step 4: Simplify right side
    239,628x = 44,194,285,316.16
  5. Step 5: Solve for x
    x = 44,194,285,316.16/239,628
  6. Step 6: Final answer
    x = 184,428.72

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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.