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Finding the Fourth Proportional to 422.25, 583.08 and 317.16

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Solution

The fourth proportional to 422.25, 583.08 and 317.16 is: 437.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.25 : 583.08 = 317.16 : x
  2. Step 2: Convert to fraction form
    422.25/583.08 = 317.16/x
  3. Step 3: Cross multiply
    422.25x = 583.08 × 317.16
  4. Step 4: Simplify right side
    422.25x = 184,929.65
  5. Step 5: Solve for x
    x = 184,929.65/422.25
  6. Step 6: Final answer
    x = 437.96

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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.