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Finding the Fourth Proportional to 579.16, 798.44 and 479.20

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Solution

The fourth proportional to 579.16, 798.44 and 479.20 is: 660.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.16 : 798.44 = 479.20 : x
  2. Step 2: Convert to fraction form
    579.16/798.44 = 479.20/x
  3. Step 3: Cross multiply
    579.16x = 798.44 × 479.20
  4. Step 4: Simplify right side
    579.16x = 382,612.45
  5. Step 5: Solve for x
    x = 382,612.45/579.16
  6. Step 6: Final answer
    x = 660.63

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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.