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Finding the Fourth Proportional to 2,375.40, 3,564.42 and 988.88

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Solution

The fourth proportional to 2,375.40, 3,564.42 and 988.88 is: 1,483.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,375.40 : 3,564.42 = 988.88 : x
  2. Step 2: Convert to fraction form
    2,375.40/3,564.42 = 988.88/x
  3. Step 3: Cross multiply
    2,375.40x = 3,564.42 × 988.88
  4. Step 4: Simplify right side
    2,375.40x = 3,524,783.65
  5. Step 5: Solve for x
    x = 3,524,783.65/2,375.40
  6. Step 6: Final answer
    x = 1,483.87

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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.