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Finding the Fourth Proportional to 356,116.98, 491,447.61 and 220,147.56

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Solution

The fourth proportional to 356,116.98, 491,447.61 and 220,147.56 is: 303,807.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,116.98 : 491,447.61 = 220,147.56 : x
  2. Step 2: Convert to fraction form
    356,116.98/491,447.61 = 220,147.56/x
  3. Step 3: Cross multiply
    356,116.98x = 491,447.61 × 220,147.56
  4. Step 4: Simplify right side
    356,116.98x = 108,190,992,209.33
  5. Step 5: Solve for x
    x = 108,190,992,209.33/356,116.98
  6. Step 6: Final answer
    x = 303,807.45

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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.