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Finding the Fourth Proportional to 484.41, 668.91 and 307.71

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Solution

The fourth proportional to 484.41, 668.91 and 307.71 is: 424.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.41 : 668.91 = 307.71 : x
  2. Step 2: Convert to fraction form
    484.41/668.91 = 307.71/x
  3. Step 3: Cross multiply
    484.41x = 668.91 × 307.71
  4. Step 4: Simplify right side
    484.41x = 205,830.30
  5. Step 5: Solve for x
    x = 205,830.30/484.41
  6. Step 6: Final answer
    x = 424.91

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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.