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Finding the Fourth Proportional to 484.05, 667.87 and 315.77

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Solution

The fourth proportional to 484.05, 667.87 and 315.77 is: 435.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.05 : 667.87 = 315.77 : x
  2. Step 2: Convert to fraction form
    484.05/667.87 = 315.77/x
  3. Step 3: Cross multiply
    484.05x = 667.87 × 315.77
  4. Step 4: Simplify right side
    484.05x = 210,894.19
  5. Step 5: Solve for x
    x = 210,894.19/484.05
  6. Step 6: Final answer
    x = 435.69

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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.