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Finding the Fourth Proportional to 3,930.68, 5,899.90 and 2,887.76

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Solution

The fourth proportional to 3,930.68, 5,899.90 and 2,887.76 is: 4,334.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.68 : 5,899.90 = 2,887.76 : x
  2. Step 2: Convert to fraction form
    3,930.68/5,899.90 = 2,887.76/x
  3. Step 3: Cross multiply
    3,930.68x = 5,899.90 × 2,887.76
  4. Step 4: Simplify right side
    3,930.68x = 17,037,495.22
  5. Step 5: Solve for x
    x = 17,037,495.22/3,930.68
  6. Step 6: Final answer
    x = 4,334.49

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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.