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Finding the Fourth Proportional to 439.44, 659.64 and 417.96

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Solution

The fourth proportional to 439.44, 659.64 and 417.96 is: 627.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.44 : 659.64 = 417.96 : x
  2. Step 2: Convert to fraction form
    439.44/659.64 = 417.96/x
  3. Step 3: Cross multiply
    439.44x = 659.64 × 417.96
  4. Step 4: Simplify right side
    439.44x = 275,703.13
  5. Step 5: Solve for x
    x = 275,703.13/439.44
  6. Step 6: Final answer
    x = 627.40

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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.