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Finding the Fourth Proportional to 493.20, 741.60 and 482.40

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Solution

The fourth proportional to 493.20, 741.60 and 482.40 is: 725.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.20 : 741.60 = 482.40 : x
  2. Step 2: Convert to fraction form
    493.20/741.60 = 482.40/x
  3. Step 3: Cross multiply
    493.20x = 741.60 × 482.40
  4. Step 4: Simplify right side
    493.20x = 357,747.84
  5. Step 5: Solve for x
    x = 357,747.84/493.20
  6. Step 6: Final answer
    x = 725.36

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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.