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Finding the Fourth Proportional to 356,045.94, 491,122.08 and 220,121.46

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Solution

The fourth proportional to 356,045.94, 491,122.08 and 220,121.46 is: 303,630.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,045.94 : 491,122.08 = 220,121.46 : x
  2. Step 2: Convert to fraction form
    356,045.94/491,122.08 = 220,121.46/x
  3. Step 3: Cross multiply
    356,045.94x = 491,122.08 × 220,121.46
  4. Step 4: Simplify right side
    356,045.94x = 108,106,509,287.84
  5. Step 5: Solve for x
    x = 108,106,509,287.84/356,045.94
  6. Step 6: Final answer
    x = 303,630.79

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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.