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Finding the Fourth Proportional to 407.56, 611.45 and 164.03

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Solution

The fourth proportional to 407.56, 611.45 and 164.03 is: 246.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.56 : 611.45 = 164.03 : x
  2. Step 2: Convert to fraction form
    407.56/611.45 = 164.03/x
  3. Step 3: Cross multiply
    407.56x = 611.45 × 164.03
  4. Step 4: Simplify right side
    407.56x = 100,292.88
  5. Step 5: Solve for x
    x = 100,292.88/407.56
  6. Step 6: Final answer
    x = 246.08

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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.