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Finding the Fourth Proportional to 579.77, 800.72 and 404.81

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Solution

The fourth proportional to 579.77, 800.72 and 404.81 is: 559.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.77 : 800.72 = 404.81 : x
  2. Step 2: Convert to fraction form
    579.77/800.72 = 404.81/x
  3. Step 3: Cross multiply
    579.77x = 800.72 × 404.81
  4. Step 4: Simplify right side
    579.77x = 324,139.46
  5. Step 5: Solve for x
    x = 324,139.46/579.77
  6. Step 6: Final answer
    x = 559.08

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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.