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Finding the Fourth Proportional to 4,765.56, 7,148.40 and 1,687.56

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Solution

The fourth proportional to 4,765.56, 7,148.40 and 1,687.56 is: 2,531.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,765.56 : 7,148.40 = 1,687.56 : x
  2. Step 2: Convert to fraction form
    4,765.56/7,148.40 = 1,687.56/x
  3. Step 3: Cross multiply
    4,765.56x = 7,148.40 × 1,687.56
  4. Step 4: Simplify right side
    4,765.56x = 12,063,353.90
  5. Step 5: Solve for x
    x = 12,063,353.90/4,765.56
  6. Step 6: Final answer
    x = 2,531.36

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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.