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Finding the Fourth Proportional to 479.81, 720 and 171.93

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Solution

The fourth proportional to 479.81, 720 and 171.93 is: 258.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.81 : 720 = 171.93 : x
  2. Step 2: Convert to fraction form
    479.81/720 = 171.93/x
  3. Step 3: Cross multiply
    479.81x = 720 × 171.93
  4. Step 4: Simplify right side
    479.81x = 123,789.60
  5. Step 5: Solve for x
    x = 123,789.60/479.81
  6. Step 6: Final answer
    x = 258.00

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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.