Home / 1,110.40-1,664.94-460.78

Finding the Fourth Proportional to 1,110.40, 1,664.94 and 460.78

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Solution

The fourth proportional to 1,110.40, 1,664.94 and 460.78 is: 690.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.40 : 1,664.94 = 460.78 : x
  2. Step 2: Convert to fraction form
    1,110.40/1,664.94 = 460.78/x
  3. Step 3: Cross multiply
    1,110.40x = 1,664.94 × 460.78
  4. Step 4: Simplify right side
    1,110.40x = 767,171.05
  5. Step 5: Solve for x
    x = 767,171.05/1,110.40
  6. Step 6: Final answer
    x = 690.90

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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.