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Finding the Fourth Proportional to 3,115.08, 4,672.98 and 923.40

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Solution

The fourth proportional to 3,115.08, 4,672.98 and 923.40 is: 1,385.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.08 : 4,672.98 = 923.40 : x
  2. Step 2: Convert to fraction form
    3,115.08/4,672.98 = 923.40/x
  3. Step 3: Cross multiply
    3,115.08x = 4,672.98 × 923.40
  4. Step 4: Simplify right side
    3,115.08x = 4,315,029.73
  5. Step 5: Solve for x
    x = 4,315,029.73/3,115.08
  6. Step 6: Final answer
    x = 1,385.21

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.