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Finding the Fourth Proportional to 5,457.88, 7,531.80 and 3,099.88

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Solution

The fourth proportional to 5,457.88, 7,531.80 and 3,099.88 is: 4,277.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,457.88 : 7,531.80 = 3,099.88 : x
  2. Step 2: Convert to fraction form
    5,457.88/7,531.80 = 3,099.88/x
  3. Step 3: Cross multiply
    5,457.88x = 7,531.80 × 3,099.88
  4. Step 4: Simplify right side
    5,457.88x = 23,347,676.18
  5. Step 5: Solve for x
    x = 23,347,676.18/5,457.88
  6. Step 6: Final answer
    x = 4,277.79

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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.