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Finding the Fourth Proportional to 379.91, 524.23 and 317.59

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Solution

The fourth proportional to 379.91, 524.23 and 317.59 is: 438.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.91 : 524.23 = 317.59 : x
  2. Step 2: Convert to fraction form
    379.91/524.23 = 317.59/x
  3. Step 3: Cross multiply
    379.91x = 524.23 × 317.59
  4. Step 4: Simplify right side
    379.91x = 166,488.10
  5. Step 5: Solve for x
    x = 166,488.10/379.91
  6. Step 6: Final answer
    x = 438.23

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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.