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Finding the Fourth Proportional to 407.82, 611.70 and 176.55

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Solution

The fourth proportional to 407.82, 611.70 and 176.55 is: 264.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.82 : 611.70 = 176.55 : x
  2. Step 2: Convert to fraction form
    407.82/611.70 = 176.55/x
  3. Step 3: Cross multiply
    407.82x = 611.70 × 176.55
  4. Step 4: Simplify right side
    407.82x = 107,995.64
  5. Step 5: Solve for x
    x = 107,995.64/407.82
  6. Step 6: Final answer
    x = 264.81

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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.