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Finding the Fourth Proportional to 484.55, 668.72 and 288.05

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Solution

The fourth proportional to 484.55, 668.72 and 288.05 is: 397.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.55 : 668.72 = 288.05 : x
  2. Step 2: Convert to fraction form
    484.55/668.72 = 288.05/x
  3. Step 3: Cross multiply
    484.55x = 668.72 × 288.05
  4. Step 4: Simplify right side
    484.55x = 192,627.19
  5. Step 5: Solve for x
    x = 192,627.19/484.55
  6. Step 6: Final answer
    x = 397.54

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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.