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Finding the Fourth Proportional to 474.77, 711.99 and 321.54

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Solution

The fourth proportional to 474.77, 711.99 and 321.54 is: 482.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.77 : 711.99 = 321.54 : x
  2. Step 2: Convert to fraction form
    474.77/711.99 = 321.54/x
  3. Step 3: Cross multiply
    474.77x = 711.99 × 321.54
  4. Step 4: Simplify right side
    474.77x = 228,933.26
  5. Step 5: Solve for x
    x = 228,933.26/474.77
  6. Step 6: Final answer
    x = 482.20

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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.