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Finding the Fourth Proportional to 493.49, 731.52 and 485.75

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Solution

The fourth proportional to 493.49, 731.52 and 485.75 is: 720.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.49 : 731.52 = 485.75 : x
  2. Step 2: Convert to fraction form
    493.49/731.52 = 485.75/x
  3. Step 3: Cross multiply
    493.49x = 731.52 × 485.75
  4. Step 4: Simplify right side
    493.49x = 355,337.67
  5. Step 5: Solve for x
    x = 355,337.67/493.49
  6. Step 6: Final answer
    x = 720.05

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.