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Finding the Fourth Proportional to 322.75, 484.56 and 317.28

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Solution

The fourth proportional to 322.75, 484.56 and 317.28 is: 476.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.75 : 484.56 = 317.28 : x
  2. Step 2: Convert to fraction form
    322.75/484.56 = 317.28/x
  3. Step 3: Cross multiply
    322.75x = 484.56 × 317.28
  4. Step 4: Simplify right side
    322.75x = 153,741.20
  5. Step 5: Solve for x
    x = 153,741.20/322.75
  6. Step 6: Final answer
    x = 476.35

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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.