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Finding the Fourth Proportional to 474.80, 711.29 and 254.89

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Solution

The fourth proportional to 474.80, 711.29 and 254.89 is: 381.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.80 : 711.29 = 254.89 : x
  2. Step 2: Convert to fraction form
    474.80/711.29 = 254.89/x
  3. Step 3: Cross multiply
    474.80x = 711.29 × 254.89
  4. Step 4: Simplify right side
    474.80x = 181,296.51
  5. Step 5: Solve for x
    x = 181,296.51/474.80
  6. Step 6: Final answer
    x = 381.84

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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.