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Finding the Fourth Proportional to 2,612.34, 3,916.08 and 879.75

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Solution

The fourth proportional to 2,612.34, 3,916.08 and 879.75 is: 1,318.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,612.34 : 3,916.08 = 879.75 : x
  2. Step 2: Convert to fraction form
    2,612.34/3,916.08 = 879.75/x
  3. Step 3: Cross multiply
    2,612.34x = 3,916.08 × 879.75
  4. Step 4: Simplify right side
    2,612.34x = 3,445,171.38
  5. Step 5: Solve for x
    x = 3,445,171.38/2,612.34
  6. Step 6: Final answer
    x = 1,318.81

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1.5x scale

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.