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Finding the Fourth Proportional to 3,951.79, 5,457.78 and 2,631.08

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Solution

The fourth proportional to 3,951.79, 5,457.78 and 2,631.08 is: 3,633.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.79 : 5,457.78 = 2,631.08 : x
  2. Step 2: Convert to fraction form
    3,951.79/5,457.78 = 2,631.08/x
  3. Step 3: Cross multiply
    3,951.79x = 5,457.78 × 2,631.08
  4. Step 4: Simplify right side
    3,951.79x = 14,359,869.45
  5. Step 5: Solve for x
    x = 14,359,869.45/3,951.79
  6. Step 6: Final answer
    x = 3,633.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.