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Finding the Fourth Proportional to 914.70, 1,372.05 and 337.80

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Solution

The fourth proportional to 914.70, 1,372.05 and 337.80 is: 506.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.70 : 1,372.05 = 337.80 : x
  2. Step 2: Convert to fraction form
    914.70/1,372.05 = 337.80/x
  3. Step 3: Cross multiply
    914.70x = 1,372.05 × 337.80
  4. Step 4: Simplify right side
    914.70x = 463,478.49
  5. Step 5: Solve for x
    x = 463,478.49/914.70
  6. Step 6: Final answer
    x = 506.70

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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.