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Finding the Fourth Proportional to 559.08, 771.17 and 440.87

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Solution

The fourth proportional to 559.08, 771.17 and 440.87 is: 608.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.08 : 771.17 = 440.87 : x
  2. Step 2: Convert to fraction form
    559.08/771.17 = 440.87/x
  3. Step 3: Cross multiply
    559.08x = 771.17 × 440.87
  4. Step 4: Simplify right side
    559.08x = 339,985.72
  5. Step 5: Solve for x
    x = 339,985.72/559.08
  6. Step 6: Final answer
    x = 608.12

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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.