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Finding the Fourth Proportional to 874.48, 1,312.18 and 327.04

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Solution

The fourth proportional to 874.48, 1,312.18 and 327.04 is: 490.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.48 : 1,312.18 = 327.04 : x
  2. Step 2: Convert to fraction form
    874.48/1,312.18 = 327.04/x
  3. Step 3: Cross multiply
    874.48x = 1,312.18 × 327.04
  4. Step 4: Simplify right side
    874.48x = 429,135.35
  5. Step 5: Solve for x
    x = 429,135.35/874.48
  6. Step 6: Final answer
    x = 490.73

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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.