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Finding the Fourth Proportional to 579.99, 870.29 and 255.28

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Solution

The fourth proportional to 579.99, 870.29 and 255.28 is: 383.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.99 : 870.29 = 255.28 : x
  2. Step 2: Convert to fraction form
    579.99/870.29 = 255.28/x
  3. Step 3: Cross multiply
    579.99x = 870.29 × 255.28
  4. Step 4: Simplify right side
    579.99x = 222,167.63
  5. Step 5: Solve for x
    x = 222,167.63/579.99
  6. Step 6: Final answer
    x = 383.05

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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.