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Finding the Fourth Proportional to 493.40, 680.52 and 345.88

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Solution

The fourth proportional to 493.40, 680.52 and 345.88 is: 477.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.40 : 680.52 = 345.88 : x
  2. Step 2: Convert to fraction form
    493.40/680.52 = 345.88/x
  3. Step 3: Cross multiply
    493.40x = 680.52 × 345.88
  4. Step 4: Simplify right side
    493.40x = 235,378.26
  5. Step 5: Solve for x
    x = 235,378.26/493.40
  6. Step 6: Final answer
    x = 477.05

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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.