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Finding the Fourth Proportional to 579.95, 798.96 and 479.95

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Solution

The fourth proportional to 579.95, 798.96 and 479.95 is: 661.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.95 : 798.96 = 479.95 : x
  2. Step 2: Convert to fraction form
    579.95/798.96 = 479.95/x
  3. Step 3: Cross multiply
    579.95x = 798.96 × 479.95
  4. Step 4: Simplify right side
    579.95x = 383,460.85
  5. Step 5: Solve for x
    x = 383,460.85/579.95
  6. Step 6: Final answer
    x = 661.20

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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.