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Finding the Fourth Proportional to 474.21, 654.45 and 277.75

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Solution

The fourth proportional to 474.21, 654.45 and 277.75 is: 383.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.21 : 654.45 = 277.75 : x
  2. Step 2: Convert to fraction form
    474.21/654.45 = 277.75/x
  3. Step 3: Cross multiply
    474.21x = 654.45 × 277.75
  4. Step 4: Simplify right side
    474.21x = 181,773.26
  5. Step 5: Solve for x
    x = 181,773.26/474.21
  6. Step 6: Final answer
    x = 383.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.