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Finding the Fourth Proportional to 320.94, 484.11 and 317.79

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Solution

The fourth proportional to 320.94, 484.11 and 317.79 is: 479.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.94 : 484.11 = 317.79 : x
  2. Step 2: Convert to fraction form
    320.94/484.11 = 317.79/x
  3. Step 3: Cross multiply
    320.94x = 484.11 × 317.79
  4. Step 4: Simplify right side
    320.94x = 153,845.32
  5. Step 5: Solve for x
    x = 153,845.32/320.94
  6. Step 6: Final answer
    x = 479.36

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.