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Finding the Fourth Proportional to 443.06, 611.36 and 256.58

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Solution

The fourth proportional to 443.06, 611.36 and 256.58 is: 354.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.06 : 611.36 = 256.58 : x
  2. Step 2: Convert to fraction form
    443.06/611.36 = 256.58/x
  3. Step 3: Cross multiply
    443.06x = 611.36 × 256.58
  4. Step 4: Simplify right side
    443.06x = 156,858.41
  5. Step 5: Solve for x
    x = 156,858.41/443.06
  6. Step 6: Final answer
    x = 354.04

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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.