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Finding the Fourth Proportional to 4,254.76, 6,379.98 and 1,945

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Solution

The fourth proportional to 4,254.76, 6,379.98 and 1,945 is: 2,916.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,254.76 : 6,379.98 = 1,945 : x
  2. Step 2: Convert to fraction form
    4,254.76/6,379.98 = 1,945/x
  3. Step 3: Cross multiply
    4,254.76x = 6,379.98 × 1,945
  4. Step 4: Simplify right side
    4,254.76x = 12,409,061.10
  5. Step 5: Solve for x
    x = 12,409,061.10/4,254.76
  6. Step 6: Final answer
    x = 2,916.51

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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.