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Finding the Fourth Proportional to 484.54, 668.72 and 307.55

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Solution

The fourth proportional to 484.54, 668.72 and 307.55 is: 424.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.54 : 668.72 = 307.55 : x
  2. Step 2: Convert to fraction form
    484.54/668.72 = 307.55/x
  3. Step 3: Cross multiply
    484.54x = 668.72 × 307.55
  4. Step 4: Simplify right side
    484.54x = 205,667.28
  5. Step 5: Solve for x
    x = 205,667.28/484.54
  6. Step 6: Final answer
    x = 424.46

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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.