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Finding the Fourth Proportional to 584.88, 874.80 and 439.20

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Solution

The fourth proportional to 584.88, 874.80 and 439.20 is: 656.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    584.88 : 874.80 = 439.20 : x
  2. Step 2: Convert to fraction form
    584.88/874.80 = 439.20/x
  3. Step 3: Cross multiply
    584.88x = 874.80 × 439.20
  4. Step 4: Simplify right side
    584.88x = 384,212.16
  5. Step 5: Solve for x
    x = 384,212.16/584.88
  6. Step 6: Final answer
    x = 656.91

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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.