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Finding the Fourth Proportional to 484.70, 668.99 and 345.58

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Solution

The fourth proportional to 484.70, 668.99 and 345.58 is: 476.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.70 : 668.99 = 345.58 : x
  2. Step 2: Convert to fraction form
    484.70/668.99 = 345.58/x
  3. Step 3: Cross multiply
    484.70x = 668.99 × 345.58
  4. Step 4: Simplify right side
    484.70x = 231,188.76
  5. Step 5: Solve for x
    x = 231,188.76/484.70
  6. Step 6: Final answer
    x = 476.98

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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.