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Finding the Fourth Proportional to 484.72, 668.68 and 310

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Solution

The fourth proportional to 484.72, 668.68 and 310 is: 427.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.72 : 668.68 = 310 : x
  2. Step 2: Convert to fraction form
    484.72/668.68 = 310/x
  3. Step 3: Cross multiply
    484.72x = 668.68 × 310
  4. Step 4: Simplify right side
    484.72x = 207,290.80
  5. Step 5: Solve for x
    x = 207,290.80/484.72
  6. Step 6: Final answer
    x = 427.65

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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.