Home / 1,469.40-2,202.28-688.32

Finding the Fourth Proportional to 1,469.40, 2,202.28 and 688.32

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Solution

The fourth proportional to 1,469.40, 2,202.28 and 688.32 is: 1,031.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,469.40 : 2,202.28 = 688.32 : x
  2. Step 2: Convert to fraction form
    1,469.40/2,202.28 = 688.32/x
  3. Step 3: Cross multiply
    1,469.40x = 2,202.28 × 688.32
  4. Step 4: Simplify right side
    1,469.40x = 1,515,873.37
  5. Step 5: Solve for x
    x = 1,515,873.37/1,469.40
  6. Step 6: Final answer
    x = 1,031.63

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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.