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Finding the Fourth Proportional to 3,114.70, 4,672.05 and 923.45

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Solution

The fourth proportional to 3,114.70, 4,672.05 and 923.45 is: 1,385.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,114.70 : 4,672.05 = 923.45 : x
  2. Step 2: Convert to fraction form
    3,114.70/4,672.05 = 923.45/x
  3. Step 3: Cross multiply
    3,114.70x = 4,672.05 × 923.45
  4. Step 4: Simplify right side
    3,114.70x = 4,314,404.57
  5. Step 5: Solve for x
    x = 4,314,404.57/3,114.70
  6. Step 6: Final answer
    x = 1,385.18

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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.