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Finding the Fourth Proportional to 484.88, 668.84 and 310.22

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Solution

The fourth proportional to 484.88, 668.84 and 310.22 is: 427.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.88 : 668.84 = 310.22 : x
  2. Step 2: Convert to fraction form
    484.88/668.84 = 310.22/x
  3. Step 3: Cross multiply
    484.88x = 668.84 × 310.22
  4. Step 4: Simplify right side
    484.88x = 207,482.65
  5. Step 5: Solve for x
    x = 207,482.65/484.88
  6. Step 6: Final answer
    x = 427.91

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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.