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Finding the Fourth Proportional to 319,628.97, 479,318.13 and 119,840.45

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Solution

The fourth proportional to 319,628.97, 479,318.13 and 119,840.45 is: 179,713.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,628.97 : 479,318.13 = 119,840.45 : x
  2. Step 2: Convert to fraction form
    319,628.97/479,318.13 = 119,840.45/x
  3. Step 3: Cross multiply
    319,628.97x = 479,318.13 × 119,840.45
  4. Step 4: Simplify right side
    319,628.97x = 57,441,697,995.77
  5. Step 5: Solve for x
    x = 57,441,697,995.77/319,628.97
  6. Step 6: Final answer
    x = 179,713.68

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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.