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Finding the Fourth Proportional to 914.56, 1,372.04 and 427.35

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Solution

The fourth proportional to 914.56, 1,372.04 and 427.35 is: 641.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.56 : 1,372.04 = 427.35 : x
  2. Step 2: Convert to fraction form
    914.56/1,372.04 = 427.35/x
  3. Step 3: Cross multiply
    914.56x = 1,372.04 × 427.35
  4. Step 4: Simplify right side
    914.56x = 586,341.29
  5. Step 5: Solve for x
    x = 586,341.29/914.56
  6. Step 6: Final answer
    x = 641.12

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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.