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Finding the Fourth Proportional to 493.62, 740.16 and 320.28

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Solution

The fourth proportional to 493.62, 740.16 and 320.28 is: 480.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.62 : 740.16 = 320.28 : x
  2. Step 2: Convert to fraction form
    493.62/740.16 = 320.28/x
  3. Step 3: Cross multiply
    493.62x = 740.16 × 320.28
  4. Step 4: Simplify right side
    493.62x = 237,058.44
  5. Step 5: Solve for x
    x = 237,058.44/493.62
  6. Step 6: Final answer
    x = 480.24

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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.