Home / 1,324.88-1,986.68-459.28

Finding the Fourth Proportional to 1,324.88, 1,986.68 and 459.28

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Solution

The fourth proportional to 1,324.88, 1,986.68 and 459.28 is: 688.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.88 : 1,986.68 = 459.28 : x
  2. Step 2: Convert to fraction form
    1,324.88/1,986.68 = 459.28/x
  3. Step 3: Cross multiply
    1,324.88x = 1,986.68 × 459.28
  4. Step 4: Simplify right side
    1,324.88x = 912,442.39
  5. Step 5: Solve for x
    x = 912,442.39/1,324.88
  6. Step 6: Final answer
    x = 688.70

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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.