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Finding the Fourth Proportional to 506.97, 699.75 and 320.64

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Solution

The fourth proportional to 506.97, 699.75 and 320.64 is: 442.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.97 : 699.75 = 320.64 : x
  2. Step 2: Convert to fraction form
    506.97/699.75 = 320.64/x
  3. Step 3: Cross multiply
    506.97x = 699.75 × 320.64
  4. Step 4: Simplify right side
    506.97x = 224,367.84
  5. Step 5: Solve for x
    x = 224,367.84/506.97
  6. Step 6: Final answer
    x = 442.57

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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.