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Finding the Fourth Proportional to 493.78, 740.40 and 484.60

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Solution

The fourth proportional to 493.78, 740.40 and 484.60 is: 726.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.78 : 740.40 = 484.60 : x
  2. Step 2: Convert to fraction form
    493.78/740.40 = 484.60/x
  3. Step 3: Cross multiply
    493.78x = 740.40 × 484.60
  4. Step 4: Simplify right side
    493.78x = 358,797.84
  5. Step 5: Solve for x
    x = 358,797.84/493.78
  6. Step 6: Final answer
    x = 726.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.