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Finding the Fourth Proportional to 579.95, 800.03 and 440.09

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Solution

The fourth proportional to 579.95, 800.03 and 440.09 is: 607.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.95 : 800.03 = 440.09 : x
  2. Step 2: Convert to fraction form
    579.95/800.03 = 440.09/x
  3. Step 3: Cross multiply
    579.95x = 800.03 × 440.09
  4. Step 4: Simplify right side
    579.95x = 352,081.20
  5. Step 5: Solve for x
    x = 352,081.20/579.95
  6. Step 6: Final answer
    x = 607.09

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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.