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Finding the Fourth Proportional to 3,087.58, 4,631.20 and 866.56

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Solution

The fourth proportional to 3,087.58, 4,631.20 and 866.56 is: 1,299.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,087.58 : 4,631.20 = 866.56 : x
  2. Step 2: Convert to fraction form
    3,087.58/4,631.20 = 866.56/x
  3. Step 3: Cross multiply
    3,087.58x = 4,631.20 × 866.56
  4. Step 4: Simplify right side
    3,087.58x = 4,013,212.67
  5. Step 5: Solve for x
    x = 4,013,212.67/3,087.58
  6. Step 6: Final answer
    x = 1,299.79

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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.