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Finding the Fourth Proportional to 559.16, 839.25 and 285.45

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Solution

The fourth proportional to 559.16, 839.25 and 285.45 is: 428.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.16 : 839.25 = 285.45 : x
  2. Step 2: Convert to fraction form
    559.16/839.25 = 285.45/x
  3. Step 3: Cross multiply
    559.16x = 839.25 × 285.45
  4. Step 4: Simplify right side
    559.16x = 239,563.91
  5. Step 5: Solve for x
    x = 239,563.91/559.16
  6. Step 6: Final answer
    x = 428.44

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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.