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Finding the Fourth Proportional to 474.42, 711.63 and 281.64

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Solution

The fourth proportional to 474.42, 711.63 and 281.64 is: 422.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.42 : 711.63 = 281.64 : x
  2. Step 2: Convert to fraction form
    474.42/711.63 = 281.64/x
  3. Step 3: Cross multiply
    474.42x = 711.63 × 281.64
  4. Step 4: Simplify right side
    474.42x = 200,423.47
  5. Step 5: Solve for x
    x = 200,423.47/474.42
  6. Step 6: Final answer
    x = 422.46

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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.