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Finding the Fourth Proportional to 914.74, 1,372.01 and 329.72

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Solution

The fourth proportional to 914.74, 1,372.01 and 329.72 is: 494.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.74 : 1,372.01 = 329.72 : x
  2. Step 2: Convert to fraction form
    914.74/1,372.01 = 329.72/x
  3. Step 3: Cross multiply
    914.74x = 1,372.01 × 329.72
  4. Step 4: Simplify right side
    914.74x = 452,381.13
  5. Step 5: Solve for x
    x = 452,381.13/914.74
  6. Step 6: Final answer
    x = 494.54

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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.