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Finding the Fourth Proportional to 421.51, 632.25 and 178.06

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Solution

The fourth proportional to 421.51, 632.25 and 178.06 is: 267.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.51 : 632.25 = 178.06 : x
  2. Step 2: Convert to fraction form
    421.51/632.25 = 178.06/x
  3. Step 3: Cross multiply
    421.51x = 632.25 × 178.06
  4. Step 4: Simplify right side
    421.51x = 112,578.44
  5. Step 5: Solve for x
    x = 112,578.44/421.51
  6. Step 6: Final answer
    x = 267.08

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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.