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Finding the Fourth Proportional to 474.43, 711.73 and 145.36

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Solution

The fourth proportional to 474.43, 711.73 and 145.36 is: 218.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.43 : 711.73 = 145.36 : x
  2. Step 2: Convert to fraction form
    474.43/711.73 = 145.36/x
  3. Step 3: Cross multiply
    474.43x = 711.73 × 145.36
  4. Step 4: Simplify right side
    474.43x = 103,455.42
  5. Step 5: Solve for x
    x = 103,455.42/474.43
  6. Step 6: Final answer
    x = 218.06

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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.