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Finding the Fourth Proportional to 559.20, 839.60 and 437.60

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Solution

The fourth proportional to 559.20, 839.60 and 437.60 is: 657.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.20 : 839.60 = 437.60 : x
  2. Step 2: Convert to fraction form
    559.20/839.60 = 437.60/x
  3. Step 3: Cross multiply
    559.20x = 839.60 × 437.60
  4. Step 4: Simplify right side
    559.20x = 367,408.96
  5. Step 5: Solve for x
    x = 367,408.96/559.20
  6. Step 6: Final answer
    x = 657.03

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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.