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Finding the Fourth Proportional to 356,399.36, 491,644.48 and 220,389.92

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Solution

The fourth proportional to 356,399.36, 491,644.48 and 220,389.92 is: 304,022.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,399.36 : 491,644.48 = 220,389.92 : x
  2. Step 2: Convert to fraction form
    356,399.36/491,644.48 = 220,389.92/x
  3. Step 3: Cross multiply
    356,399.36x = 491,644.48 × 220,389.92
  4. Step 4: Simplify right side
    356,399.36x = 108,353,487,615.64
  5. Step 5: Solve for x
    x = 108,353,487,615.64/356,399.36
  6. Step 6: Final answer
    x = 304,022.68

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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.