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Finding the Fourth Proportional to 407.95, 612.24 and 164.64

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Solution

The fourth proportional to 407.95, 612.24 and 164.64 is: 247.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.95 : 612.24 = 164.64 : x
  2. Step 2: Convert to fraction form
    407.95/612.24 = 164.64/x
  3. Step 3: Cross multiply
    407.95x = 612.24 × 164.64
  4. Step 4: Simplify right side
    407.95x = 100,799.19
  5. Step 5: Solve for x
    x = 100,799.19/407.95
  6. Step 6: Final answer
    x = 247.09

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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.