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Finding the Fourth Proportional to 582.14, 872.64 and 427.85

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Solution

The fourth proportional to 582.14, 872.64 and 427.85 is: 641.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.14 : 872.64 = 427.85 : x
  2. Step 2: Convert to fraction form
    582.14/872.64 = 427.85/x
  3. Step 3: Cross multiply
    582.14x = 872.64 × 427.85
  4. Step 4: Simplify right side
    582.14x = 373,354.66
  5. Step 5: Solve for x
    x = 373,354.66/582.14
  6. Step 6: Final answer
    x = 641.35

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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.